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Lateral J Patella Knee Brace


Availability: In stock

Attention Medicare Patients

Stabilizes the kneecap to prevent dislocations and alleviate pain. Unique patented nylon core and polyester Lycra fabric, it allows for improved airflow while still giving ample support and compression.  Read More

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Product Details

Product Description

Is the Lateral J Patella Brace Right for me?

If you suffer from lateral patellar subluxation, dislocations, or improper patellar tracking this is the brace for you.

Designed to treat and protect:

  • Dislocating Kneecaps (Patellar dislocation)
  • Lateral Patellofemoral Malalignment
  • Lateral Patellar Subluxation
  • Chondromalacia

Best for:

  • Everyday activities
  • Non-contact sports

Stabilizes The Kneecap To Prevent Dislocations And Alleviate Pain

The DonJoy Lateral J knee brace is our most popular patella stabilizing brace. The brace is equipped with a tubular, lateral “J” buttress that runs alongside the knee and provides support against lateral patellar subluxation, dislocations, or improper patellar tracking. The Lateral J knee brace can be worn during day-to-day activities, as well as sports and in water.

Drytex is DonJoy's exclusive solution for patients with neoprene sensitivities or those who prefer less warmth from their bracing. Constructed of a unique patented nylon core and polyester Lycra fabric, it allows for improved airflow while still giving ample support and compression. Perfect for people in warm weather climates and those with neoprene allergies or irritations. (Photo images are of Drytex material with seams. Neoprene material, not shown, does not come with seams).

The Lateral J Patella Support is available with a removable hinge for added stability for an additional cost.

Product Features…and the benefits you’ll experience!

Tubular, Lateral “J” Buttress
Helps stabilize your kneecap (patella). Available in left or right configuration.
Lateral to Medial Straps
Provides additional stabilization and you get to adjust the straps to provide the support that you need.
Available in Drytex or Neoprene
Pick the material that suits your needs.

Product Care

Hand wash and air dry.

Sizing and Measurements

Click on the Size Chart tab above to learn how to measure your leg to determine what brace size you need.

Shop our complete selection of knee braces or browse additional DonJoy products.

Size Chart & Fit Help

Take the measurement of your thigh and calf 6" above and below your kneecap using a flexible type tape measure.  Use the circumference you measure here to choose your size.

    Size Thigh Knee Center Calf
    XS 13" - 15 1/2" 12"-13" 10"-12"
    S 15 1/2" - 18 1/2" 13"-14" 12"-14"
    M 18 1/2"- 21" 14"-15" 14"-16"
    L 21"- 23 1/2" 15"-17" 16"-18"
    XL 23 1/2" - 26 1/2" 17"-19" 18"-20"
    XXL 26 1/2" - 29 1/2" 19"-21" 20"-22"

    Center Knee 1.Stand with your legs shoulder-width apart, legs slightly bent and leg muscles contracted.
    6 in Above 2. Measure up six inches from the center of your knee with a tape measure, as shown.
    Thig Circle 3. Measure the circumference of your thigh at the 6-inch mark, as shown.
    6 in below 4. Measure down six inches from the center of your knee with a tape measure, as shown. Then measure the circumference of your calf at the 6-inch mark.


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DonJoy Lateral J Patella Knee Brace

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  • Alexis at 8/31/2015 12:37 PM
    • I'm interested in purchasing this brace, and I signed up and was given a coupon code, but there's no where to enter the code at purchase. I could very well be missing something, but where can I enter this code?
    • Once you add something to your cart, there will be a link to add a discount code. If it still is not working for you, you can call Customer service and place your order this way
  • Tomeka Smith at 8/30/2015 10:44 AM
    • My daughter is a competition cheerleader and she popped her knee cap out of place. Is this a brace that she could use while tumbling and competing? Thanks
    • Tomeka
      Yes this brace would be appropriate
  • Alyson at 8/28/2015 3:46 AM
    • My knees are a bit more flexible than average (regarding side to side movement), pulling toward the outer sides. I was told by my doc that I should look into getting this item. However, I did not know about the hinge option. To hinge or not to hinge considering the info provided above?
    • Alyson
      I would suggest getting the brace with hinges and if they are uncomfortable you can remove them. The hinges will provide more side to side support.
  • Cheryl at 8/27/2015 5:17 AM
    • My 12 year old daughter is a cheerleader and was recently diagnosed with patella femoral syndrome and requires a brace with lateral patella support for her left knee. It is important that the brace doesn't restrict her movement and she wants a brace that will do this yet be as short as possible. her thigh measured 15" about 2" above the patella and about 17 inches 5-6" above. What would you recommend? 1-800-553-6019.

      Have a Great Day.
    • Hello,

      Thank you for contacting Betterbraces. I recommend the Tru-pull lite, to provides the most support for someone who has a patella that dislocates laterally. The brace is 9" in length and the shortest available. I recommend measuring her Knee and order the brace based off her knee measurement, since the brace is only 9" in length. This brace does run a little small so, if she's on the upper end of the size chart, order the next size up. Please contact us with any additional questions.
  • Michelle at 8/19/2015 8:48 AM
    • My 15 y/o son dislocated his knee cap during football. His positions are outside linebacker and wide receiver. I am looking at the Lateral J Patella knee brace and am wondering if I should purchase the hinges. The knee is stable with tenderness over his MCL. Would you recommended the hinges and what material?
      Thank you
    • Yes, we would suggest going with the hinged version of the DonJoy Lateral J Patella Knee Brace. This will provide more medial and lateral support and protection. For sports the Drytex material is suggested, its a bit more breathable and comfortable.
  • Juliana at 8/8/2015 4:47 PM
    • So I'm in dance and I need a knee brace that isn't bulky and could potentially fit underneath my leggings. Would this be the right brace? I had hyperextended my knee and dislocated my knee cap and need protection while lm dancing.
    • Juliana,

      The Tru-Pull Lite, is good for mild to moderate patella instabilities, dislocations, or tracking issues and should offer protection while dancing.

  • ravyn at 3/26/2015 7:30 PM
    • what is the difference between materials which is better?
    • Ravyn
      The neoprene is like wet suit material, and a typ of rubber-like material. The Drytex is a lighter cooler material that slides on easier as well. If you live in warm weather I would suggest the Drytex
  • Bo at 2/16/2015 8:21 AM
    • Would the hinge be a good idea if you also strained your MCL along with the kneecap dislocation?
    • Bo
      Yes the hinges will protect that ligament
  • Greg at 2/12/2015 8:20 AM
    • My measurements are as follows:

      Thigh: 20"

      Knee: 15 3/4"

      Calf: 16"

      Would you recommend a Medium or a Large?

      Thank You

    • Greg
      The medium should fit you
  • Stephanie at 2/4/2015 7:58 AM
    • It has been suggested that I purchase this knee brace for my Chondromalacia of Patella and Patello-femoral syndrome. I am between a size L and XL.My calf size is 16in but my thigh measures 24in for both knees. What size should I get? I would like something breathable and comfortable that I can wear under my slacks at work or during workouts.
    • Stephanie
      Go with the Large brace and choose the Drytex material. That material is stretchier, and may still fit your thigh. My fear of you getting the XL is that the calf will be so bid that the brace will slide down. We do have a 90 money back guarentee if you need to get the XL
  • Kristine at 11/30/2014 2:44 PM
    • How can I determine if the knee brace I currently have has hinges or not? I have a DonJoy with Dry Tex left knee brace. Thank you.
    • Kristine
      If you have hinges in the brace you will be able to feel rigid parts on both the inside and the outside of the brace. The hinges would bend with the knee
  • Jeffrey at 11/28/2014 7:52 PM
    • I am a long time ice hockey official and have been experiencing some right knee pain (knee cap) the past year. I will probably need a knee replacement one day. I had a synvisc/cortisone shot a few times that has helped but still have some discomfort especially when I push off from a standing position to follow the flow of the play. What type of knee brace would you recommend for this type of activity? Need something that is flexible and easy to put on before taking to the ice.
    • Jeffrey
      I would suggest the Don Joy Reaction Web Knee Brace. This brace is light weight easy to put on and helps reduct anterior knee pain caused by patellar femoral pain
  • Dawn at 11/20/2014 5:47 AM
    • My 8 year old son has Patellofemoral Pain Syndrome. His physical therapist recommend a C brace. The sports medicine doctor recommended a J brace. Is the DonJoy Lateral J Patella Knee Brace what I want for an 8 year old? We tried on braces in the clinic, but they were so long that they got up into his "business." How long are these braces?
    • Dawn
      This brace is about 12 inches long. You could try the Tru-Pull lite the brace is shorter but has a lateral buttress for patelofemoral Pain.
  • kyrena at 11/19/2014 7:19 PM
    • How thick is this material?
    • 1/8th of an inch
  • Matt at 11/13/2014 6:49 AM
    • My Doctor recommended a J brace or a C brace (She wasn't sure of the name) for my knee because my IT band is pulling my knee out of alignment. Which brace is going to do that for me?
    • Matt
      The Lateral J Knee Brace will help with the problem you are having with your knee.
  • eric at 9/16/2014 9:45 AM
    • Can full force brace be worn over Lateral J Patella Knee Brace?
      I have ACL, MCL and kneecap dislocation.
    • Thank you for your question. If you have room, it can be worn under the brace. another option you may want to look at is the Tru-Pull Advance Attachment, designed to attach to rigid hinged knee braces to provide patellar tracking.
      This can be ordered direct from DJO at 800-336-6569. Please let us know if you have any additional questions.
  • Tim at 8/23/2014 5:57 AM
    • My daughter has been wearing the Lateral J Patella Knee Brace. The problem is that the velcro material scratches the opposite thigh, We have the brace with Drytex. Is the Neoprene brace any different regarding the velcro strapping? Any suggestions? She has tried taping but that doesn't seem to help.
    • Tim
      The straps will be the same on a neoprene brace as on the drytex. Maybe a light sleeve over the brace to protect the oppsite leg. The DonJoy Reaction Sleeve is a very light sleeve
  • Tim at 8/9/2014 12:44 PM
    • My daughter had a patellar subluxation about 16 months ago. She is now playing soccer and feels the need for knee support. We are going to order the Lateral J Patella Knee Brace. How do we determine if she gain additional benefit by having the hinges? Thank you.
    • Tim
      You will only need the hinges if she has joint instability which, it does not sound like she has any. She does not nee the hinges if her only issue is patella subluxation.
  • Ethel at 7/31/2014 5:58 PM
    • Would like to purchase the Lateral J Patella Knee Brace for my daughter who plays high school and travel volleyball. I would like to get the Drytex material(because it would be cooler) but I am afraid that it will slide down. She is a middle blocker/hitter and is constantly jumping. Would the neoprene be better for staying up (but also a lot hotter). Also, should I get the one with or without the hinges?

      Thank you!
    • Ethel
      The neoprene may feeltighter initially becasue it is a rubber material but it will collect sweat and become hevier which may allow it to slide. The drytex will be cooler and won't collect water.
  • Chandni at 7/10/2014 1:40 PM
    • I have dislocated the same knee three times in the last 10 years, and I'm only 21. I am a dancer and cannot imagine my life without dancing, but my doctor says if it happens again then I'll have to get surgery to tighten the ligaments that hold my kneecap in place, because both kneecaps are very loose (it's a wonder this hasn't happened to my other knee yet). My PT suggested this brace for dancing in the future, so I just want (1) to verify if this is a good choice, (2) are the hinges a good addition for my situation, and (3) what the two materials are like and how they differ.

      Thank you!
    • !. Yes this brace is appropriate for someone who has dislocated the kneecaps
      2. I would suggest that you do not need the hinges, they are only needed if you feel you have instability in the knee joint
      3. Neoprene is like wetsuit material and drytess is similar but more breathable and not as hot
  • Jeannie at 4/8/2014 8:47 PM
    • My son is a competitive rower. He has this brace in neoprene but he cannot bend his knee as much as a rower needs to and the neoprene is irritating his skin. Would he get more range of movement with the polyester version of this brace? He needs to bend his knee pretty far to row. If this will not work is there another brace that might?
    • Jeannie
      I would suggest the Tru-Pull Lite knee brace: The brace is a liter material and will allow the knee to bend completley with the same support of the kneecap in the front of the knee.
  • Kate at 3/15/2014 9:09 PM
    • Hi,
      I just received my Lateral J brace & it's super tight. My measurement was
      Thigh- 19.5
      Knee- 14
      Calf- 15

      I ordered a medium & it is just really tight, I don't think it's cutting off circulation but it's leaving a pretty big imprint on my skin. Should I reorder a large or will it stretch overtime? I have to have the J piece because of my injury and surgery so I can't switch braces. Please let me know.
    • Your measurments put you right in the middle of the medium brace. It should be snug but not cut off circulation. My fear is that if you get the large it will be too big. If you purchased it on BetterBraces then you have a 90 money back guarrantee so wear if for a while and see how it feels.
  • Ben at 3/10/2014 7:20 PM
    • Hi, my knee measurements are:
      calf: 14"
      knee: 15"
      thigh: 17"
      should I go with a small or medium?
    • Thank You for your question. Because of your knee measurements a DonJoy Performer Patella Knee Support or a DonJoy Tru-Pull Advanced System may be a better choice because they wrap around the knee to help keep the brace on. In either of these braces a Medium would be appropriate.
  • Katie at 3/10/2014 11:36 AM
    • I just received my lateral J patella support knee brace and it is really right. Is it supposed to be very tight? Or should I order the next size up?
    • Katie
      The brace should be snug but not so tight that it is cutting off circulation. wear it around the house for a few hours and if it is unbearable then you would need to order the next size up
  • Ben at 3/7/2014 9:53 AM
    • Hi, I've dislocated my knee cap a few times and recently chipped the patella as well. My doctor said that chipped spot will grow back with weaker fibro cartilage as the stronger original hyaline cartilage will not grow back. I"m looking for a brace that will prevent future dislocations and also protect the fibro cartilage from chipping, is this the right brace for me?
    • Ben
      The lateral j is a good brace to prevent further dislocations. another choice is the Tru-Pull Lite. It is a shorter brace not as hot and gives a little more control over pulling that kneecap into the correct position.
      Either brace would be a good choice
  • Kristin at 3/6/2014 7:07 PM
    • I have lateral patellar tracking, however my patella tracks inward so I need something to correct it. Most braces look like they are pulling the patella inward, does that mean if I am injured on my right knee that I should order a left brace to pull it the correct direction?
    • Thank you for your question. A good brace for medial tracking problems would be the DonJoy Performer Patella Knee Support.
  • Sue at 3/4/2014 6:42 AM
    • My 11 year old daughter has dislocated her patellar twice during dance due to patellar tracking/groove issues. The doctor had prescribed an xs Breg PTO brace, but the hinges are too restrictive for dance and she cannot wear it. Do you have any other suggestions for something lighter that has a j or butress to keep the knee cap tracking properly, but still allow for less restrictive movement such as a dancer would need.
    • Thank you for your question. The lateral J is a great option for your daughter’s diagnosis. The Tru-Pull Lite is a small/light brace with a buttress that may also work for your daughter.
  • Richie at 2/19/2014 6:14 PM
    • Two and a half years ago, I dislocated my kneecap playing football. I went through PT and wore the Tru-Pull Lite brace. About 6 months later, I dislocated my kneecap again while playing indoor soccer with the Tru-Pull Lite brace on. After that, I switched to the Breg PTO Soft knee brace and have had no knee issues since while wearing it during 2 football seasons and 1 lacrosse season.

      Now, 2 years removed from my last dislocation, I am considering trying out a lighter knee brace because I have not had any knee dislocations or subluxations since but am still uncomfortable playing sports without a knee brace. My biggest concern with this DonJoy Lateral J brace is if it really does keep sufficient pressure on the lateral edge of the kneecap when the leg is fully extended. Can you verify this? Also, how does this brace compare with the Breg "Lateral Stabilizer Soft Knee Brace"? Is one better than the other?

      Finally, which material would be better to get, Drytex or neoprene? Does one material tend to slip more than the other?

      Thank you so much.
    • Richie
      The Breg is similar to the Lateral J, both have the same mechanism. If you would like a brace for extremely active people that will keep constant pressure on the kneecap you should look at the Reaction. It will keep the kneecap tracking in the Femoral groove, it has a teflon infused elatomeric web that as you flex it will get stronger to keep continuous support on the kneecap.
  • Christian at 1/25/2014 9:03 AM
    • I've had a 3 knee dislocations spaced about 7 years apart. All where caused by slip and falls where the knee cap displaced to the lateral side and corrected itself in the same action. My PT suggested that my quads are pretty weak, and have since been training them.

      I've had an MRI and nothing out of the ordinary has been found. I've also gone through rehab, but still I have some clunking/clicking occasionally in the knee along with pain and swelling.

      My PT originally suggested a neoprene sleeve, perhaps with some stabilizers for use in my kickboxing class which I have not been attending of late.

      I am currently using a Bauerfeind GenuTrain, but find that it causes more problems than helps pushing on the kneecap.

      After the injury, I originally purchased the "Shock Doctor Ultra Knee Support with Bilateral Hinges", which my PT said was way too restrictive and much more than I needed.

      Do you think the Don Joy Lateral J with Hinges would be a good fit for me.

      I've taken the following measurements.

      Thigh : 20.5"
      Knee Center: 16"
      Calf: 15.25"

      Much Thanks,
    • Christian
      The Tru-Pull Lite is better than the Lateral J because the buttress can be positioned right at the end of the kneecap so you can control the tension against the patella.
  • Kumaran at 1/24/2014 6:44 AM
    • I had a ligement tear/strech on my left knee some 8 years ago. didnt went for the surgery.
      I dont have any problem in narmal day to day activities. But do feel the instability occasionally when i play cricket, which makes me to fall. Please suggest me a suitable Knee brace whch is no bulk and will give support on the sides and allows me to play freely.

      Thanks in advance
    • Thank you for your question. The DonJoy Lateral J is primarily used for Patellar instabilities. If your instability is the patella this is a great brace. If your instability come from ligaments you may consider looking at the DonJoy Deluxe Hinged knee
  • Charley at 1/21/2014 6:22 AM
    • Hello, I have dislocated my knees a few times over the years, the last time 3 years ago getting on a ski lift when I was snowboarding. I keep very fit and don't get a lot of trouble from my knees. The odd slip here and there, I have used the DonJoy Tru-Pull Advanced braces for the past couple of years when I go snowboarding, they have been great in respect to my knee not dislocating but when it comes to comfort they are terrible. I don't use them for anything else just boarding. Do you think if I swap to these they will still be as affective, but a lot less bulky but still give the same results?
      Thanks for your time, kind regards
    • Thank you for your question. The Later J is an excellent choice for patellar stability. This brace will be more stream line and along with the lateral support you received from the Tru-Pull Advanced brace you will also receive inferior patella support. If you have any further questions please contact a product specialist at 888.405.3251.
  • Jessie at 1/3/2014 10:59 AM
    • I currently have the neoprene lateral J knee braces (both knees). I have to wear them when I run and they seem to take forever to dry (if I try to wear them the next day they are still wet, even if I didn't wash them out). I'm interested in the difference between the drytex and the neoprene versions and wonder which one might be better for running outside in Georgia.
    • Thank you for your question. The Neoprene material is much like a wet suit material, the Drytex is a more breathable material. Due to the heat and humidity you may experience in Georgia, the Drytex would be a good option for you. The drytex “wicks” away the moisture keeping your leg dry and keeping the brace from slipping due to trapped moisture. Please call us or email if you have any further questions.
  • Andre at 12/26/2013 9:41 AM
    • I have had multiple patella dislocations over the last 20 years, it first happen while skiing, then it repeatedly happened while skating, playing hockey or making a false movement. I have met one of the top knee specialist here (Montreal) and had a bio-mechanical test perform, basically there is not much to be done beside working to strengthen my quads. The knee cartilage is bit worn and also have osteoarthritis of the knee. Ironically I dont have real pain or nothing that prevent me from running, biking or practicing karate weekly. The Dr say, I need to manage my human capital until I get older and get a total knee replacement surgery. I have always practice sport and I can't get the idea of no longer skiing, skating or playing hockey for fun. I had stop practicing those sport for few years but even though my knee cap would dislocate in all kind of situation. Last year, after training hard for 2 months, I went to ski a couple of time and my knee hold-up fine and had no pain, but I know dislocation will happen sooner or later no matter how careful I am and whatever I do. We only have one life to live and I dont want to live mine sitting in front of a TV set. I was suggest to buy a knee brace that will give me the extra security I need to practice my preferred sport. I am now very careful in ski, ( no more double daffy or 360 if you see what I mean), I only play hockey and skate in a non competing mode, just for fun. I'm thinking of ordering the DonJoy Lateral J Patella Knee Brace with hinge, do you think this is the best brace for me. Thank in advance for any advice. Best regards André
    • Andre
      Since you have had multiple dislocations I would suggest our best patello-femoral brace for that which would be the DonJoy Tru-Pull Advanced System.
      This brace will help keep the patella tracking in the right position. The material of the brace is Drytex breathable material and you can get it witha hinge to give added medial and lateral support. This brace will work better than the lateral J
  • Rob at 12/15/2013 7:17 PM
    • thigh 21 1/2
      knee 14 1/2
      calf 14 1/2

      What size should we order and are the side supports removable?

    • Rob
      Thank you for contacting product support. The thigh is a large but the calf and knee center are meduim. If you order the large it may slide doen because of the size of the calf. You can try the large, you have 90 days to return it for a full refund on The stays are removable
  • Brianne at 11/26/2013 8:52 AM
    • Just want to confirm a size for this brace.

      thigh 21 3/4 in
      knee 17 1/2 in
      calf 15 1/4 in

      Thank you!
    • Brianna,
      A large should fit you well. Thank you for your question and contacting DJO.
  • Mary claire at 10/26/2013 10:01 AM
    • I had an ACL repair 2 years ago and I would like to start playing cutting sports again. I have developed a patella tracking issue since my surgery and my doctor suggested this brace. I am nervous to buy this brace since it is not for ACL support and I will be playing cutting sports again(recreationally).

      Will this still support my ACL?
    • Mary
      Thank you for contacting product support. The DonJoy Lateral J Patella Knee Brace does not give support for the ACL, only patella tracking and if you get the hinged version that will give you some medial and lateral support. The Playmaker or Playmaker II with a patella donut would be a better choice. The Playmaker has our four-Points of Leverage stapping system that we use on our rigid ACL braces. The strapping creates the right kind tension to protect the ACL. The other option is one of our rgid ACL braces with a Tru-Pull Attachment for your patella. You can take a look at the Playmaker here:
  • sierra at 9/4/2013 9:16 PM
    • I have this brace, was wondering if there was something smaller with the same support ? Also would really prefer if this brace came in tan.? I hate having to wear such a big brace and it being so noticeable. I have dislocated my left knee two times so think this is the best support ? I have read you have total mobility with this brace however I can't seem to bend my leg only to barely walk without a limp.?
    • We do not have a tan brace that would help with your patella issues, however, the Reaction is a lighter lower profile brace that would keep that patella tracking efficiently or the Tru-Pull Lite is a lower profile less bulky patellafemoral brace.
  • Allen Krolikowski at 9/1/2013 8:24 AM
    • Hi,
      I wear a Donjoy Brace, OA Adjuster, Lateral, left, L, Ref# 11-0873-4, for active sports. I am looking for a lighter, slip- on brace, I can wear just for walking around or light activity. What would you recommend? My measurements are 14"-16"-18"
      thanks, Al
    • The OA Lite is a fabric brace with the unloader hinge in it, if you are looking for the same type of unloading in a sleeve style brace.
  • Jason at 8/4/2013 3:35 PM
    • I measured according to your procedures. From top down, 25", 18.5", 19". I ordered an XL. I love the drytex material, but can't keep this brace to stay up. A few steps will make it slip down, even though it is tight. Should I loosen/tighten the straps more? Should I look at another model? Should I have gotten the hinges?
    • Hello Jason,

      The Lateral J Knee Brace doesn't slip down unless it is too big for you. The Drytex Material stretch's a bit more than Neoprene, does the brace feel too large for you, do you have extra material that gathers?

      Did you order an XL?

      Thanks for Contacting Donjoy.
  • Juanita Morris at 7/29/2013 5:08 PM
    • I have big thighs and a muscular calf, what size shall I get. Oh and I'm tall so I'm thinking large but I've ever worn a knee brace before. I tried on a small but that didn't get above my calf.
    • Hello ,

      Please see the Sizing Chart to determine your size. See the link below.

      Thanks for Contacting Donjoy.
  • Andrew at 6/6/2013 7:04 PM
    • I had an ACL repair roughly 6 years ago, and a torn meniscus about a year ago. Most recently, my patella began to sublux occasionally. I'm looking for a brace that will support the patella and provide overall knee stability without being too bulky. I'd also like something that I could wear during sports. Currently, wearing it every day wouldnt be the norm...but it may develop into that as my knees get worse (at that point I would look for a more suitable everyday brace).I've basically narrowed it down to the Reaction and the Lateral J. Which of these two braces would more fit my requirements? Or possibly a different brace?

    • Hello Andrew,

      The Lateral J would be a good option for you, the J buttress provides support to the patella and the length of the brace provides compression and support to the knee.

      You have one more option for a Patella Stabilizer. The Tru-pull Lite, provides moderate support and is a smaller brace about 8 inch's in length.

      Please call a Product Specialist for additional questions. 1-888-405-3251.
  • Steve at 5/30/2013 7:24 AM
    • Thigh is 22 1/4
      Knee is 18
      Calf is 17 1/4
      Would you say large or x large?
    • Hello Steve

      I recommend a Large for you, your at the center of the measurements, if you were a 23 i would suggest the XL.

      You have a 6 month warranty and can return the product if you don't like the fit.

      Have a Great Day.
  • Katie Dubs Woodard at 5/29/2013 6:03 PM
    • I just got my lateral j braces in the mail. They are super uncomfortable. The seams or rough spots on the brace made me want to take them off within an hour. They chafed really bad. Do you have any suggestions on how to fix that, like put the braces on the outside of pants or something?
    • Hello Katie,

      You may need a different type of material. You can return those braces and try the Tru-pull lite, it's made of a mesh material and not as thick as the neoprene J Brace.

      Please call us. 1-888-405-3251.

      Have a Great Day.
  • Cynthia at 5/29/2013 12:03 AM
    • I have medial and lateral patellar subluxation, though it is more pronounced in the lateral direction. I don't want a bulky brace and the J shape looks like it might provide the minimal medial support I need. I'm sensitive to neoprene so the drytex alternative is a plus. Does the lateral J sound like a good choice?
    • Hello Cynthia,

      Yes, the J Brace is a great option for Lateral Patella Support. Another option you may consider is the Tru-Pull Lite. It's a low profile brace, the shortest Patella Brace we have. Provides both medial and lateral support. Find the link below.

      Please call a Product Specialist if you have additional questions. 1-888-405-3251.

      Have a Great Day.

  • Vickie at 4/27/2013 1:57 PM
    • Need some help in ordering the right size:
      Thigh - 22 "
      Knee - 16"
      Calf - 14"
      I had polio as a child and now have some atrophy in calf of leg which causes the odd size calf. What size should I order? I have had trouble with knee brace slipping down to my ankle. I have found the neoprene material stays in place better for me.
    • Hello, Vickie -

      We would recommend a size LARGE.

      If you have further questions, please feel free to contact our product specialists at 888-405-3251.

      Thank you and have a wonderful day!
  • Jessica at 8/6/2012 8:26 PM
    • Hi, I just want to make sure i get the right size. I am a female with these measurements
      Thigh: 18.8''
      Center knee: 14.5''
      Calf: 13''

      Should I get a Medium?
    • Yes, medium.
  • Anne at 7/25/2012 6:31 PM
    • Hi there! It seems as if I am right between sizes and am unsure to go up or down.
      I am a female long distance runner with these measurements:
      Thigh 18"
      Knee 14"
      Calf 14"

      Do I need a small or medium?
    • You should go with the medium. Better braces has a 90 day return policy so you could always return it within the 90 days.
  • Tammy Proctor at 7/17/2012 6:56 PM
    • Do you make a waterproof patella knee brace- My daughter is a swimmer and requires the brace to be streamline and water resistant. Do you make one?
    • All of our braces can be worn in the water. Garret McNamara professional surfer wears our braces. The brace will have to be rinsed with tap water and should be air dryed.
  • Bob Wheeler at 5/3/2012 4:58 AM
    • What is the difference between neoprene and drytex
    • Drytex is a more breathable fabric than neoprene. Neoprene is a wetsuit type material.
  • Punia at 5/2/2012 11:57 AM
    • Hi,

      I am so sorry, but its a typo. i gave wrong size. I apologize. Obviously that a wierd size.
      Its thigh - 16-1/2'', center knee - 14-1/4'' , calf - 12''. What size shoud i go for?

    • Small
  • Punia at 5/2/2012 6:15 AM
    • Hi,

      I am not able to figure out the size for brace. As suggested in size chart how to measure size, my size is thigh - 16 1/2'', knee center - 16 1/4'' and Calf - 16 1/2''.
      What size should i go for. Please suggest.

    • Medium. However you may like the Donjoy Reaction Knee Brace better because it's a wrap around design so you can customize the fit better since your thigh is smaller than you knee and calf, that may fit better.
  • Don Gentry at 3/31/2012 6:27 AM
    • I have a Donjoy Lateral J DryTex knee brace and would like to know how to clean it. Can I just put it in the clothes washer on gentle cycle? I have had it for 6 weeks and it needs to be cleaned/washed.
    • Hi,

      We recommend hand washing the brace with mild detergent and letting it air dry.

      Have a ncie day
  • Carol at 11/30/2011 4:19 AM
    • My son is a wrestler and needs a brace to support his patella. His current brace only allows him to bend 90 degrees. Will the Lateral J allow him a broader range of motion? Thanks
    • Correct the Lateral J will allow him full range of motion while supporting the lateral patella tracking problems.
  • LUi at 7/6/2011 8:09 PM
    • MY wife is a size zero in pants and is a skinny 24 year old. What size should i get her?
    • You will have to do a measurement on her thigh to determine the size she needs. we cannot size based on pant size.
  • Beau at 6/27/2011 2:13 AM
    • Hi. I recently got the tru pull advance system for my knees for basketball..but the braces are just way to bulky and always are slipping down and the bands go over my knee..I saw this it looks like a much more active and light brace with great support..would this help prevent patella dislocations just as well?
    • The Donjoy Tru Pull Lite or Lateral J would be more low profile than the Tru Pull Advanced System and still prevent lateral tracking and dislocations of your patella. Please let us know if you have any further questions.
  • DORETTA at 6/20/2011 5:26 PM
    • I am confused by the term "hinge" in the ordering of this brace. Are you referring to the internal side-mounted stabilizers or some type of external framework? I am looking to replace my current knee brace (just like this one) and don't know if I have a hinge or not.
    • Hi Doretta,
      The new Lateral J braces have hinges that sit in pockets in the material that are rigid. These hinges are removable. If you had hinges on your old Lateral J brace you would have noticed, so more than likely the brace you have does not have hinges.

  • Mike at 6/10/2011 5:26 PM
    • Have used the tru pull lite but still had some minor dislocation. Will the Lateral J provide more support of the knee cap?
      Daughter wants something with more support. Will this hinged product provide that?
    • I would suggest doing the Tru-Pull advanced system, you can do it with or with out hinges. This brace is going to provide the highest level of patella support.
  • Mary at 1/29/2011 3:57 PM
    • what is the advantage of a hinged knee brace
    • The addition of hinges to a DonJoy Lateral J Patella Knee Brace will increase stability to the knee.
Reviews (8)


DonJoy Lateral J Patella Knee Brace

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Great brace

Reviewed by:
After dislocating my knee cap, I wore another brace that was difficult to move in, this is the most comfortable brace I've ever worn, and it allows me to do my PT without worry of my knee cap moving. I love it.
Posted on May 8, 2015

Functional, but uncomfortable

Reviewed by:
This brace does what it's supposed to do, but it's really quite uncomfortable. The seam up the back is extremely annoying and the raw edges on the velco tabs are scraping up my other leg.

Standing for long periods, etc., have definitely become less painful since purchasing the brace, but I find myself having to weigh whether it's worth the discomfort of wearing it.
Posted on October 28, 2014

good knee support

Reviewed by:
I've been wearing these braces on both of my knees for about a year now. My kneecaps don't track well, and they provide stability and compression. I've used both the drytex and the neoprene, and while the drytex doesn't make me as sweaty, if I'm doing anything other than standing (i.e. walking, hiking, jogging, etc.), the drytex braces almost immediately start shifting, which makes my kneecap fall out of range of the active part of the braces. The drytex braces also stretch out pretty quickly, creating a need to buy a new brace. So I'd recommend the neoprene braces for anyone who's active at all.
Posted on July 26, 2014


Reviewed by:
My knee cap would dislocate and then come back in every week. I had a small surgery on it but then it happened again when I was playing field hockey. I didn't want it to happen again so I met up with my athletic trainer and he told me to get this brace. It feels much comfortable than the other brace I had. I can move around in it and feel 100% safe and confident it won't come out again
Posted on September 4, 2013


Reviewed by:
this one brace I got NOT from your company was horrible it gave me pain and I couldn't bend my knee and it was over $100 it was a rip off and we think it gave me osteoporosis

now this brace is FANTASTIC very easy to run and move around in can bend your leg and sometimes I forget that I'm even wearing a knee brace it's awesome I've been using this one for about 6 months Love it I use it because I fully dislocated my left knee playing basketball and tore a few ligaments has great support I'm getting ready to order 2 more one for my right and one for my left my orthopedic Dr. recommended doing so for basketball and softball since it can easily happen to my other knee... the reason I'm ordering another one for my left is because I had to wear it for a few months until my knee stopped giving out on me and for PT and sports Its still in really good shape just ordering a new for when school starts for sports takes about a week or two to break in I HIGHLY RECOMMEND THIS PRODUCT
Posted on August 7, 2012

Extremely Pleased

Reviewed by:
I bought one of these roughly eight months ago for my left knee. I had a severe knee cap dislocation eight and a half years ago and didn't have surgery. I was looking for a product with more support than the McDavid bands I had been using (which really don't do very much). I was looking for elements of a sleeve and a brace that allowed me to move around. This product does both extremely well.

I am currently training for a half marathon and have been running 15-25 miles per week. It takes some getting used to, but the product provides the compression of a sleeve and the medial and lateral support of a brace without being overly bulky. The J padding and straps keep my kneecap completely still. The pain while running is reduced significantly and my bad knee can still be sore after a long run, but I figure everyone is different in this regard.

A few notes: (1) Running a lot with one brace became a bit uncomfortable so I bought the same brace for my right knee. With only one brace on, my left leg was doing something different than my right. Over time, it got annoying and I was afraid I was going to injure myself. Although my right knee has no ailments (other than a shallow trochlear groove, as is the case with my left knee as well), I found the identical brace on my right knee to be the perfect solution. Doing interval / sprint workouts takes some getting used to because your range of motion is decreased a bit, but I still make it work. (2) Pull the sleeve up your leg enough so that the curve of the J pushes / nudges up against your kneecap. (3) I'm not sure how well this product will work during sports that require a lot of sprinting / shorts burst or changing direction. I've been playing competitive co-ed touch football for over two years. I tried playing middle linebacker and receiver with my brace for one game. I felt too slow and haven't worn it sense, even though I really know I should. Tackle football (high school and below), depends on the position. Basketball might be the same senario as football. Soccer you might be able to get away with wearing it. Hockey, you absolutely can wear this. Baseball, not sure.

Overall, this product (on both knees) allows me to feel confident enough to do a ten week training regimen leading up to running a half marathon. If my injured knee holds up, this product will help me run a full marathon in six months. For the record, I'm not a doctor, so this review is my opinion only and extremely unscientific.
Posted on April 24, 2012

if the brace was able to stay in place it would be fantastic

Reviewed by:
After my knee cap dislocation due to patellofemoral grooves which were found to be shallow allowing my cap to dislocate with any lateral force doing ligament,tendon and muscle damage as well. I found that the brace moves around with light exercise or movement needing constant adjustment however when it is in the proper place over the knee cap it is comforting and provides the necessary support to keep the cap in place.
Posted on February 2, 2012

Great knee brace

Reviewed by:
i used to have a knee brace that would destroy my knee but then i got this brace and saw a huge improvement. It seems to be more supportive and just a great overall knee brace
Posted on June 11, 2011