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Armor Knee Brace with Standard Hinge

Availability: Out of stock

Attention Medicare Patients

Provides active people with protection from ACL, MCL, or PCL injuries. This is one of our supportive knee braces that you can get without a prescription.
This item requires custom fitting and is only available through your doctor with a prescription.

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Product Details

Product Description

One of Our Best Off-the-Shelf Knee Braces

The DonJoy Armor knee brace is the brace to use if you are an extremely active individual or athlete who suffers from an ACL, MCL, or PCL instability or injury. If you're concerned about preventing a ligament injury, try the Armor. It's one of our supportive knee brace that doesn't require a prescription and it also helps minimize your chances of suffering from one of these painful injuries.

The Armor is ideal for athletes who play football, ski, snowboard, ride motorcross, surf, wakeboard, or participate in similar high impact sporting activities.

The DonJoy Armor knee brace is used to treat or prevent the following injuries:

  • Moderate to severe ACL or PCL instabilities
  • ACL/PCL combined instabilities (CI)
  • Recovery from ACL or PCL reconstructions
  • MCL or LCL instabilities
  • Hyperextension

Product Features...and the benefits you'll experience!

  • Available in ACL, PCL, and CI Versions
    You get to choose the brace that is right for your injury, which means your knee will get the proper support where you need it most.
  • Four-Points of Leverage Dynamic System
    This patented technology was developed to reduce the strain on the ACL by distributing the load placed on the ligament via four points. Click here to learn exactly how the Four-Points of Leverage works.
  • Custom Frame and Swiveling Strap Tabs
    Get a perfect fit by molding the brace to your knee, as well as enhance the fit and suspension of the brace with the swiveling strap tabs.
  • 6061 T6 Aircraft Aluminum Frame
    Wear a strong, thick and stable knee brace that is lightweight and low profile.
  • Anti-migration Supra Condyle Pad
    Your knee brace will stay in place.
  • Calf Pinch Guard
    Provides a smooth transition between boot and calf cuff so you'll never pinch your calf again. This is an add-on accessory that is purchased separately.
  • Impact Guard
    Protects the shin and knee against blunt blows, as well as prevents you from ripping pants or uniforms. This is an add-on accessory that is purchased separately.

Sizing and Measurements

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

Instructions for Use...how to put on your DonJoy Armor Knee Brace.

To ensure you are properly applying your brace, click on the Video tab above and watch our Fitting Video.

Need Replacement Parts?

Shop DonJoy Armor Replacement Parts for strap kits, condyle pads and more.

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" - 15.5" (33-39 cm) 12"-13" (30-33 cm) 10"-12" (25-30 cm)
    S 15.5" - 18 .5" (39-47 cm) 13"-14" (33-35 cm) 12"-14" (30-35 cm)
    M 18.5" - 21" (47-53 cm) 14"-15" (35-38 cm) 14"-16" (35-40 cm)
    L 21" - 23.5" (53-60 cm) 15"-17" (38-43 cm) 16"-18" (40-45 cm)
    XL 23.5" - 26.5" (60-67 cm) 17"-19" (43-48 cm) 18"-20" (45-50 cm)
    XXL 26.5" - 29.5" (67-75 cm) 19"-21" (48-53 cm) 20"-22" (50-55 cm)
    XXXL 29.5" - 32" (75-83 cm) 21"-23" (53-58 cm) 22"-24" (55-60 cm)

    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.



About the Armor: A quick overview on the DonJoy Armor knee brace including the mechanics of the brace and how it can help someone who is suffering from ligament instabilities.

Fitting Video: learn the proper way to apply your knee brace.
Product Questions (45)

Product Questions

DonJoy Armor Knee Brace with Standard Hinge

Product Questions

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  • Bg at 9/23/2016 9:23 AM
    • I had dislocated my knee last year during football and I was recommended to get a knee brace to help my knee from dislocating again . What knee brace would you recommend for contact ?
    • Thank you for contacting Better Braces. If you are just needing the brace to help keep the kneecap from dislocating i would recommend the Tru-Pull Advanced System with hinges https://www.betterbraces.com/donjoy-tru-pull-advanced-system-1. If you are needing a more rigid support for the knee joint you could do an armor and a local representative could help you in getting a Tru-Pull Attachment that can be added to the rigid brace.
  • Christian at 8/20/2016 3:43 PM
    • I bought the Donjoy armor with standard hinge off Craigslist. I was wondering why it kept slipping. Come to find out, I'm missing the hinge and strap for strap #4. Is there a way to buy the hinge for strap #4?
    • Unfortunately no, there is no hardware available for the Armor. You would need to purchase a new brace.
  • PTMama at 8/9/2016 5:38 PM
    • I have no quad strength from a cancer surgery where most of my quad muscle was removed. I need a brace that limits my knee flexion to 30 degrees. Which brace has a hinge that can be adjusted to that setting?
    • The DonJoy Armor Knee Brace with the Standard Hinge does come with additional hinge stops to adjust the degree of flexion and extension. Please contact us at 800-553-6019 so that we can get some additional information about your injury to recommend the best brace for you.
  • Josh Green at 6/16/2016 4:01 PM
    • What is the difference between standard and short calf length
    • The difference between the Standard and short length calf is 1 inch. The calf portion will be shorter by 1 inch.
  • Noah at 5/18/2016 5:58 AM
    • I am an offensive lineman and just looking for some protection. I have not had any knee injuries but would like to protect my knees. Which hinge option should I choose?
    • We recommend the Fourcepoint hinge, this hinge will prevent you from going into hyperextension and keep your knee out of the "at risk" position in which the ACL Tears. We recommend the Fourcepoint Hinge.
  • Rachel at 4/30/2016 7:29 AM
    • I have a stretched mcl due to my hips being weak and my knees turning in when I jump. I am very active in playing ultimate frisbee and insanity disc workouts as well as being a very high level competitive swimmer. My kneecap also subluxates constantly because of my other knee problems. I want to keep my knee stable, because it often feels like it could give out and hyperextend as it has before. What brace would you suggest? Thank you
    • A hinged brace will help to support the MCl and knee joint. Take a look at the Economy hinged knee brace. The brace has hinges on both side of the brace that are sewn into the material so as to not hit the opposite leg. Theis brace will give you general support of the knee and allow you to be active while wearing it. https://www.betterbraces.com/donjoy-economy-hinged-knee
  • Irene at 4/5/2016 6:32 AM
    • I swear quite a bit when I play basketball which causes this brace to slip down while I am playing. I have to constantly pull myself out of the game to re-adjust. What can I do to keep this brace from slipping down?

      Thank you,
    • You can try wearing it on top of the lycra undersleeve.
  • Tan at 3/10/2016 11:51 PM
    • I wish to get a brace for my mom who is 73 years old. She has a weak right knee. What would you recommend.
    • For general support to the knee I would reccommend the Economy hinged knee brace. The brace is not too big and can be easily put on and should give her support when standing and walking.
  • Joe at 2/28/2016 1:12 PM
    • Last year I tore my ACL, MCL, and Menicus while playing full contact blocking flag football. I was trying to break through some blockers on a screen pass. Last year I had full knee reconstruction. The brace I was given restricts my mobility, all 6 straps have trouble staying connected and it never stays fully aligned with my knee when I first put it on. I'm looking for a brace that gives me the mobility I need to run at full speed and to make a lot of quick cuts. I mainly play linebacker, cornerback and safety, so I'm making quick cuts to jump routes. The other problem I have is that massive quads, so above the knee is one size and below the knee is a smaller size. What would you recommend?

    • Well you will need to wear a functional knee brace such as the Don Joy Armor Knee brace with the fourcepoint hinge to protect the knee while doint those activities. This brace is considered off the shelf so you can only get the thigh and calf in one size. The Defiance is custom made so can accomidate the different size thigh and calf
  • Brian U. at 12/29/2015 3:06 AM
    • I currently have a torn acl and meniscus on my left knee. I am able to jog, but feel very unstable when running/cutting/jumping while playing basketball. I was wondering if the armor or fullforce be the best option in my condition. I will also be having surgery in the near future so I am looking for the brace that can work as a pre-op and post-op brace.
    • Both braces are good braces for someone like yourself who has an ACL tear. The Full Force is a lighter and lower profile brace than the Armor. If you have no swelling now then you can wear the brace and after rehab your knee should be around the same size as it is pre-surgery so you can wear the brace after as well.
  • Rodnie T at 11/24/2015 4:16 AM
  • Kim B at 11/10/2015 9:19 AM
    • I am needing this brace for hyper extension of the knee after my son had a stroke. He is currently wearing an AFO that reaches up above his calf. Can he still wear this brace? To what degree does it stay bent? If it does not fit or meet his needs are we able to return it?
    • Kim
      The brace comes with a 10 degree extension stop already installed in the brace to prevent hyper-extension. You will need to place the brace over his AFO, but BetterBraces has a 60 day return policy
  • Jorge at 10/2/2015 8:25 PM
  • Connor at 9/13/2015 11:33 PM
    • I'm a football player and to be honest I do not want to wear the braces because I feel they significantly constrict my speed but I am being forced too. Is there any way I can adjust the braves to allow more motion? And also i have had them multiple times lovk up on each other and i trip and fall. How would i prevent this?
    • Connor
      I would suggest having your athletic traininer or PT or doctors office(where ever you got the braces) have a look at them and if they are braces with our fourcepoint hinge the fourcepoing mechanisim can be turned off to allow full motion without resistance. If you have braces with our standard hinge on them there is no adjustment to be made. If you have trouble with the hinges locking, that could be a warranty issue. Again I would have you take the braces to your athletic trainer
  • Miguel at 9/10/2015 10:59 AM
    • I want to order this brace, but I don't like the color. Is there a way I can change only the color?
    • Miguel
      Patient ready braces like the Armor only come in one color, the color you see on the website. The only brace in which you can choose a color is the Custom Defiance
  • John Neth at 6/22/2015 10:16 AM
    • I have been wearing the brace for about a year and a half. I have no patella in my left leg. Brace helps a lot and it will be a long term item. Where can I get replacement pads which go on the frame itself and the foam that goes on the straps. Thanks JOhn
    • We have a complete replacement softgoods kit for the Armor Knee Brace, you can order it by clicking this link: https://www.betterbraces.com/donjoy-armor-fourcepoint-ci-full-replacement-kit
  • D.M. at 5/30/2015 2:02 PM
    • I try to do a myriad of exercises for variation and flexibility. I am mainly concerned in preventing "ANY and All" knee damage when I do long-bar deadlifts, kettlebell deadlifts, bicycling, rowing, speed walking, and advanced aerobic routines. The DonJoy Armor Knee Brace with Standard Hinge has my attention of choice. Do you have a better recommendation? Please let me know as I want to purchase immediately for both knees as I have a decade of history of on-off meniscus and ligament moderate injuries with excellent recoveries, but hope braces will minimize further damage in future workouts. Please let me know. Thanks.
    • The Don Joy Armor Knee brace is one of our best braces and should work to help protect your knees
  • Brian at 4/7/2015 1:05 PM
    • Would the "short" version of the Armor brace give me a better chance of being able to still wear my cowboy boots? I just had my PCL replaced 6 weeks ago and want out of the immobilizer and into a good everyday brace
    • Brian
      Yes the short calf would wrok better with your boots
  • Bill at 2/1/2015 3:10 PM
    • My right knee hyperextends due to nerve damage from back surgery. I currently wear a KAFO due to the knee collapsing after the back surgery. The knee has gotten stronger over the last year and has not collapsed when I don't wear the KAFO. I would like to wear a smaller knee brace that is hinged and will allow normal walking movement. I would wear this brace mostly around the house and out walking. What is your recommendation for a knee brace?
    • Bill
      The Armor Knee brace will provide that support that you want. Good choice, it also comes with extension stops that you can add if you need to to prevent hyper-extension
  • Peter at 12/22/2014 7:54 AM
    • I've sprained my MCL and am looking for some protection and support heading to a long-awaited skiing trip. In the 'knee compartment' selection, MCL is not an option; the choices are ACL, CI and PCL. Which is the best option? Or is there a better suggestion for protecting the MCL during skiing/snowboarding? Thank you.
    • Peter
      You will want to choose the CI strapping for a MCL injury. This will give you the most support for your knee.
  • Helena Brack at 12/18/2014 10:43 AM
  • Jesus at 12/4/2014 6:04 PM
  • Tom at 11/27/2014 6:00 PM
    • I have a partially torn ACL and need a brace for tennis and skiing. I'm 5'11".
      1. Will a short brace provide the proper protection for tennis or do I need both a standard and a short brace?
      2. Is there any difference in the comfort and migration between a standard length brace and a short length brace?
    • Tom
      In order to ski in the brace you will have to get the short calf, so that the brace will fit with the boots. The short calf is fine for other sports as well. The short calf will provid e better fit and avoid migration better
  • Eliot at 10/7/2014 11:26 AM
    • Hello:
      I'am a mountain bike rider, in a competitive way, weeks ago I had an accident, in the MRI I have a stretching MCL 2-3 degree and a contusion on the femoral condyle.
      Which knee brace is the one that I need? I'am thinking to come back again to the sport. The one that I have on mind is the Armor extreme,
      Any advise ? Tks!!!
    • The Armor would be a good choice for a brace. It wil protect your kne and can be worn while riding your bike
  • Dave at 10/1/2014 9:13 AM
  • Bea at 9/8/2014 7:04 AM
    • I had tkr 4 yrs ago. 6 mos after in rehab I had a moderate strain of mcl. Since have strained LDL and have moderate to severe hyperextension due to weakened Pcl.
      I cannot undergo surgery now. The therapist has tried several donjoy braces but none prevent my knee from hyper extending even with limiting the hinging. What do you recommend? I do yoga and Pilates along w biking and elliptical. I cannot walk or play tennis. Comfort is important.
    • Bea
      The brace that will have the possibility of limiting your hyperexteion would be a rigid knee brace with our fourcepoint hinge and extension stops. The hinge has resistance to extension and the stops will further decrease the moment but if you have already tried these products there may be no other option. You should speak to your therapist and physician for any other available treatments if bracing has not worked
  • Eric at 6/11/2014 10:30 AM
    • I'm an ocean lifeguard and an avid surfer and skimboarder. I was wondering if I could wear my DonJoy in the ocean regularly? Will the saltwater corrode the brace at all? Thank you!
    • Eric
      You can wear the brace in the salt water just make sure to rinse the hinge afterwards to make sure no sand gets caught inside.
  • Chris V at 5/29/2014 7:55 AM
    • I'm an amateur strongman, so I carry extremely heavy loads over various distances. As an example, carrying a 350 pound block of concrete 50 feet in a straight line, turning back and carrying it back. Walking in a straight line with 800 pounds across my shoulders or holding 250+ pounds in each hand is also fairly common. Additionally, I have moderate-severe OA in both knees, mostly on the lateral compartment of each.

      Which braces have the best chance of providing some support and stability while also withstanding that sort of loading?
    • Chris
      Take a look at the DonJoy FullForce OA brace. https://www.betterbraces.com/oa-fullforce-knee-brace This brac is for mild to moderate OA and you can get it for the lateral compartment of your knees. The brace is lightwieght and low profile so you can wear it during your strongman stuff.
  • Mike at 4/24/2014 7:23 AM
    • I tore my lcl in my left knee playing football and I was wondering what brace options should I choose for the don joy armor
    • Mike
      You should get the standard Hinge with CI strapping, and depending on your height, if over 5'2" get the standard calf length
  • Todd at 1/1/2014 2:06 PM
    • I have a completely torn PCL from a hockey injury but my other ligaments and meniscus are completely normal. I have not had surgery and just rehabbed my knee. I have no pain or loss of function. I would like to go skiing and was wondering if you would recommend just the PCL version or the combination PCL and ACL version to prevent damage to the ACL.
    • Todd
      The donJoy Armor with a standard hinge PCL strapping and short calf is what you want
  • Albert at 12/1/2013 9:54 PM
    • I had PCL Reconstruction and still have minor stretching of the MCL. What would be the best brace for me when doing activities like Martial arts (e.g. Wrestling, Hapkido, and Ju-jitsu etc.), and Running. When running or sprinting to be exact I feel the tibia start to shift forward and back wards. Would the braces help stop or limit this movement?
    • Hello Albert,

      I recommend looking at Donjoy's ACL/PCL Braces. We recommend the Armor for contact sports, or the Full-fource for non-contact sports/activities. Please take a look at the link below.

      Thanks for Contacting Donjoy.
  • carter at 11/7/2013 12:46 PM
    • So about a year and a half ago I tore my acl and pcl wakeboarding I am trying to get an idea of what the best brace for my situation would be. I still get pain every now and again especially when I am in the gym working it I play basketball 2 or 3 times a week but still feel like my knee is not stable. It's about to be snowboarding season and I need to invest in a brace that will hold my knee together in pretty much any situation. I guess my question is what brace is going to accomplish this better the armor or the defiance?
    • Carter
      Both of these braces have the same technology, four-points of leverage strapping system and standard hinge. The difference is that the Defiance is custom made for your leg only whereas the Armor runs in sizes. If you were to measure your leg 6 inches above the mid-kneecap, 6 inches below mid-kneecap and around the center of your knee then check the sizing chart, if your measurements fall withing one of the sizes that would be the size you would need. If you thigh measures on size and the calf a different size then you would want to go with the Defiance because we will make it to the shape of your leg. Either brace will give you excellent protection while snowboarding.
  • Anne Thrax at 9/18/2013 7:45 AM
    • I torn my MCL and dislocated my knee cap playing Roller Derby. I would love to return to the sport, but need to wear a hinged brace. With so many options - I'm not sure which would work best for me.
    • The Tru-Pull Advanced with hinges will give you support for the MCL and the Tru-Pull will keep the kneecap in the groove and help keep it from dislocating derby on Anne!
  • Whay at 9/17/2013 6:02 PM
    • My thigh measures 17", calf 12 1/4", but my knee center is only 11 1/2". What size should I choose?
    • You should order a small. The Armor can be pushed in at the knee some to take up that gap and you can use a thicker condyle pad.
  • John Jacobs at 8/31/2013 11:41 AM
    • I have an extreme bone contusion in my right knee on my Tibial Plateau. I am a serious wakeboard, and a high school pole vaulter. I am wondering about the support this brace will have on the bones in my knee? also i would like to know if it would prevent future bone contusions in my knee?
    • You should look at the Armor and the knee guard attachment that would give you the most support and protetction, i would also recommend a sports cover for when wakeboarding.
  • YOSHA at 8/1/2013 1:15 AM
    • Hello. I have an torn ACL, torn meniscus that was shaved down and removed debris and also little to no cartridge in my left knee. I recently purchased an armor action brace. Was that the wrong brace to purchase.
    • Hello Yosha,

      The Armor is a great brace for the ACL. We also have Meniscus Knee braces if you are interested in providing off-loading to your knee. Please see the link below to learn about Arthritis Knee Braces.


      Thanks for Contacting Donjoy.
  • Tyler at 7/16/2013 10:32 AM
    • I have a meniscus tear but the ligaments are still in tact. Which knee compartment would you recommend for this brace?
    • Hello Tyler,

      Are you interested in an Osteo Arthritis Brace? The Armor is not an OA Brace. Which compartment is affected, your medial or lateral?

      Thanks for Contacting Donjoy.
  • Lori at 4/3/2013 9:57 PM
    • Which Knee Compartment do I choose for an MCL/Meniscus tear injury?
    • Hello, Lori -

      If you have an MCL/Meniscus tear, the strapping does not affect these injuries. The strapping is for either ACL, PCL or CI (combined instability). It is normally recommended to choose ACL strapping, unless you know for sure you have PCL injury involvement because the ACL is the most commonly injured ligament.

      Thank you and have a wonderful day!
  • carol at 2/14/2013 11:23 PM
    • i don't know how to use the final strap, marked both 4 & 5,. directions are not clear
    • Hello, Carol -

      Please refer to this link. You want to watch the video entitled DonJoy ACL Knee Brace Fitting. This video will teach you how to apply the strapping sequence appropriately.


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

      Thank you and have a wonderful day!
  • Brandon at 2/10/2013 2:13 AM
    • Does this brace come in any other colors?
    • Hello, Brandon -

      No, this brace does not come in any other colors. The only braces that you are able to choose a color or pattern would be our custom Defiance braces.

      Thank you and have a wonderful day!
  • Matt at 5/23/2012 8:42 AM
    • Hi there i was looking on your sight about a knee brace that would help prevent injuries towards my right knee, i have a torn MCL and a slighty torn ACL i am a football athlete looking for something i can depend on. I was viewing the DonJoy Knee Brace with Standard Hinge. would this be something you recommend? With that said i also saw something about no delievy's to Canada, would this mean i cant purchase a brace from you're company?

      Thank you for your time.
    • The Armor with FourcePoint Hinges are best for ACL injuries. You could use the standard hinge as well, it just provides less support specifically for the ACL. For Canadian orders please call our Canadian office at 866-866-5031.
  • Whitney at 1/17/2011 5:12 PM
    • Is this brace good for me to play volleyball? i torn my acl, mcl, meniscus in 4 places, & sprained my pcl. Should i get another brace or this one?
    • Hello Whitney,

      The DonJoy Armor is a great rigid brace. If you want the same protection in a lighter brace, also check out the DonJoy Full Force Ligament Knee Brace.

  • Franz at 1/5/2011 5:55 AM
    • 1. What is the difference in inches between the "standard" and "short" size?

      2. What part of the brace is shorter on the "short" size, the part of the brace which is below the hinge or above the hinge?

      3. I am purchasing the brace primarily to avoid knee hyper-extension ( PCL protection?). I see that in the "Knee Compartment" section above there are three options in the "Choose option..." box: ACL, CI and PCL. Does each of these represent a slight variation in the brace and if so, what are the variations?

      Thank you.
    • Hello Franz,

      1. 1 inch
      2. Calf Cuff
      3. The strapping sequence changes to address the ACL, PCL or both, (CI or combined instability)
  • Ken at 1/3/2011 5:50 PM
    • I had a ACL repair but after playing soccer post rehab it got a little loose on me. Now when I play any type of dynamic sport my knee gets a little loose. What brace should I choose the full force. Defiance. The only dynamic sport I do now without instability is skiing. But I would like tp play soccer and b ball with my kids.
      Which would be the best choice defiance, full force ?
      Also what difference between rx braces and off the shelf. Thanks. Ken
    • Hello Ken,

      The DonJoy Defiance is a custom knee brace that is built specifically to your measurements. Because of this, the Defiance will always be the best rigid brace we carry in support and ACL protection.

      The DonJoy Fullforce is a great top of the line off the shelf brace (meaning sized like small, medium, large). This brace will add support and stability to the knee and help protect the ACL.

      Neither braces will require a prescription.

      Either brace will fit the application and activity level you described.
  • Rick Garcia at 9/19/2010 7:47 AM
    • My thigh and calf measurements place me in the medium size range but my knee size does so in the large range. Which size would fit best?
    • Hello Rick,

      Send us an email @ service@betterbraces.com with your measurements so that I can give a more accurate recommendation.
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