11-0541-X 11-0541-X 29.99

Reaction Knee Undersleeve


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Attention Medicare Patients

DonJoy Reaction Undersleeve Replacement  Read More

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Product Details

Product Description

Replacement undersleeve for the DonJoy Reaction Knee Brace and DonJoy OA Reaction Web Knee Brace. Made with 85% Nylon and 15% Spandex.
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.

Note: The DonJoy Reaction Sleeve runs small. If you measure between sizes we recommend going up one size for optimum comfort and fit

    Size Thigh
    XS/S 13.5" - 18 .5" (39-47 cm)
    M 18.5" - 21" (47-53 cm)
    L 21" - 23.5" (53-60 cm)
    XL 23.5" - 26.5" (60-67 cm)
    XXL 26.5" - 29.5" (67-75 cm)
    XXXL 29.5" - 32" (75-83 cm)
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DonJoy Reaction Knee Undersleeve

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  • Alfred at 10/11/2015 4:00 AM
    • I received my Donjoy brace from my doctor who measured my calf, knee and thigh before ordering the brace and it relieved the awful pain in my knee. But I get blisters from where it is connected. My question is should I have had a sleeve with the brace?
    • Alfred
      A undersleeve could help with any friction the brace is creating on your skin.
  • Markanthony Williams at 5/27/2015 2:39 PM
    • What other donjoy knee braces can I wear the DonJoy Reaction Knee Undersleeve with?
    • You can wear that under sleeve with any brace although it is only 13 inches in leangth
  • Laura at 5/14/2015 4:44 PM
    • What options are there if you have a silicone allergy? So far we have had to wear the sleeve inside out. This works but obviously not as good as with the "stay put" dots of silicone.
    • Laura
      If the sleeve is causing irritation we should be able to sen our Lycra undersleeve to you instead. Just call BetterBraces if you purchased from there, or call customer care at 800-336-6569
  • Peter Teichman at 1/12/2015 12:21 AM
    • I have a Bledsoe knee brace that slides down while using, will the reaction knee sleeve prevent this? I need more friction to prevent the sliding.
    • Peter
      If you want an undersleeve to prevent your Bledsoe brace from slipping I would suggest the neoprene undersleeve.
  • Van at 8/16/2014 9:04 PM
    • My Dr. put me in the DONJOY Drytex™ Hinged Knee Brace about 2 weeks ago. Been doing well till it hit over 100 degrees recently. Now I have a bad heat rash. I also wear braces on both feet/legs and the heat rash is there also. What do you recommend to wear under the the foot/leg & knee brace to keep down the heat rash? I was looking at the DonJoy Reaction Knee Undersleeve and was wondering if this would help?
    • Van
      The sleeve for the Reaction might work under the other braces to keep the heat rash down
  • john at 6/1/2014 1:36 PM
    • Where can I buy a reaction knee sleeve?
    • John
      Call Customer Care at 800-336-6569
  • Jordan at 4/15/2014 7:28 PM
    • I was wondering what is the length of the Don Joy reaction under sleeve? I currently have one that is 15.5' and am looking for something close.
    • Un-stretched it is about 13 inches
  • Roy at 1/20/2014 6:54 AM
    • Are you able to ship the Donjoy Reaction undersleeve to the UK? I already have the brace, which is excellent, but my sleeve is becoming threadbare.

      If you can send it, what shipping charge would I incur if I ordered two?

    • Hello,

      Unfortunately, we do not ship outside the U.S. Please contact your local representative for purchasing the replacement sleeve.


      Thanks for Contacting Donjoy.
  • Kelile at 12/16/2013 12:01 PM
    • I was issued a DonJoy Knee Brace back in 2001 or 2002 to better support my right knee that was made stable with screws. I found that knee brace to be cumbersome. Will this knee brace work for my knee?

      Thank you
    • Kelile
      Thank you for contacting product support. The Reaction Knee Brace is for those who suffer from anterior knee pain caused by patellofemoral dysfunction, problems associated with the kneecap and mild arthritis. If you need medial and lateral support you need to stick with a hinged knee support.
  • Roberta at 6/26/2013 11:43 AM
Reviews (2)


DonJoy Reaction Knee Undersleeve

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This brace is great!

Reviewed by:
I just got my brace yesterday and I love it!! It helps support my knee so that I have no pain or swelling. It stays in place and doesn't pinch my leg. I like it better then the copper brace that I have and I wish I would have ordered two of them.
Posted on September 24, 2015

Use of sleeve and brace before surgery and sleeve alone after

Reviewed by:
Before having knee surgery for a knee replacement my doctor ordered your brace and sleeve for me. The combination along with medication helped me greatly with the terrible pain I suffered. After the surgery I recently started using the sleeve alone because of pain and swelling. It has given me excellent results with pain and the swelling. I highly recommend your products.
Posted on January 9, 2015

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