DP151KB04-X DP151KB04-X 84.99

Bionic Knee Brace



Support for injured and recovering knees, ligament sprains/tears

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Our DonJoy Performance Bionic Knee Brace features support and protection from lateral forces that occur in everyday sport and activity. The Hex shaped Patella opening provides Patella support and stability while articulating more freely as the knee goes through flexion and extension. Asymmetrical hem lines and stretch webbing closure system ensure the proper fit for comfort and controllable compression. The wrap around design of this knee brace allows for quick, easy on/off without the need to remove shoes. Our bilateral polycentric hinges with hyperextension stops are sure to keep unstable, ligament damaged and sprained knees from getting in the way of performance.

Features & Benefits

Size Chart & Fit Guide

Measurement taken at the center of the knee (directly over patella)

Circumference Thigh (Above knee 15cm) Knee Center Calf (Below knee 15cm)
S 15.5"-18.5" 13"-14" 12"-14"
M 18.5"-21" 14"-15" 14"-16"
L 21.0"-23.5" 15"-17" 16"-18"
XL 23.5"-26.5" 17"-19" 18"-20"

How to Measure

  • 1. Stand with your legs shoulder-width apart, legs slightly bent and leg muscles contracted.

  • 2. Measure up six inches from the center of your knee with a tape measure, as shown.

  • 3. Measure the circumference of your thigh at the 6-inch mark, as shown.

  • 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.

Still have questions? Call our support team at 844-331-7767 to chat with a fit specialist!

How to measure

Product Questions

  • Erin Gillies at 9/13/2016 5:28 PM
    • I'm a hockey goalie. Will this brace give me stability while being flexible
    • The DonJoyPerformance Bionic Knee, would offer you both the stability and flexibility needed as a goalie.
  • Kevin at 9/3/2016 5:38 AM
    • How washable is the knee brace for every day wear.
    • You can hand wash this brace in a mild detergent and lay flat to dry.
  • See More Questions
  • Maria at 8/31/2016 4:18 PM
    • I have a sprained MCL and this brace was recommended. Can you please advise:
      1. Can the bionic knee brace be used while surfing?
      2. Can it be worn underneath a wetsuit, or will it be better on the outside of the suit?
      3. I saw a video where it looked like the leg with this brace on could not bend that much - I need to be able to go from standing to a crouch - will this brace allow this much range?
      4. If appropriate for watersports, how would I clean this brace?
      Thanks very much.
    • Yes, the Bionic Knee brace can be worn while surfing or during other water sports. You will just need to rinse with clean water and let air dry afterwards. You can wear this brace either on the outside of a wetsuit or inside- whichever is more comfortable for you. The brace will allow you to bench, while keeping your knee out of the "at risk" position. Clean this brace with clean water and hang to dry.
  • Heather at 8/31/2016 8:43 AM
    • What is the CPT for this brace? To put on a referral to dispense in office?
    • Thank you for contacting Don Joy Performance. The Bionic knee brace does not have a CPT code as it is a consumer item.
  • Adam at 8/23/2016 10:15 AM
    • I have a torn MCL. I need a brace with a rigid hinge and stiff metal side bars, not just semi-flexible plastic side bars. Will the Bionic Knee Brace serve this purpose? Are the side bars and hinges similar to those in the conventional Hinged Knee brace offered through doctor's office? I need to avoid valgus loads on my knee during normal daily activities. I won't be playing sports until injury is fully healed.
    • Yes, the Bionic Knee Brace has dual rigid aluminum hinges that provide medial/lateral support and protection.
  • Shelly at 8/20/2016 9:39 PM
    • Can this brace be used while cycling?
    • Yes you can wear the Bionic Knee while cycling.
  • Steve at 8/18/2016 2:26 PM
    • I injured my knee area last year during college rugby, and my patella and overall knee in general has been a little unstable ever since. Would this be a good brace for that?
    • Yes, the Bionic Knee Brace provides maximum support for MCL/LCL instabilities, hyperextension, and general meniscus support.
  • Mary at 7/19/2016 12:17 PM
    • I have osteoarthritis in both knees, one moderate/severe, the other mild. I have been using Juzo braces to play tennis, but find them very tight, restrictive and almost impossible to take off when wet. Would this brace be suitable for a senior woman who plays tennis 2/3 times a week and has medial pain in both knees? I am looking for a light but supportive brace which can be easily pulled on and off. Thanks.
    • You could try the Bionic knee, however, there is a brace very similar except it is designed for osteoarthritis. It is called the OA Reaction Web Knee. https://www.betterbraces.com/donjoy-oa-reaction-web-knee-brace
  • Isaiah Gordon at 7/18/2016 11:57 PM
    • Is this brace waterproof? I have lingering pain in my knee from a previous injury, so I'm looking for something I can slip over my wetsuit while kite surfing.
    • Yes, you can wear this brace in the water. Make sure to rinse the brace with fresh clean water after and air dry.
  • Tennis Girl at 7/15/2016 11:50 AM
    • I play tennis 2+ times per wee and have issues with knee. Dr suspects lcl or mcl. What brace would you suggest for use during matches?
    • The Bionic Knee Brace is a good brace to protect the LCL and the MCL while moving laterally in tennis. Additionally, the hinges are covered in material which some sports require if worn during play.
  • Michael H at 7/11/2016 8:10 PM
    • I have had two meniscectomy surgeries to my right medial meniscus.
      Would you recommend this Bionic brace, the Webtech, or the Reaction?
    • Yes the Bionic Knee Brace will help provide support after your meniscectomy. The bilateral hinges will provide support to the knee medially and laterally and prevent hyperextention.
  • Kevin at 7/2/2016 11:50 PM
    • I have a partial PCL tear. Would this be a proper brace for me for general day to day activities and sports? If not please recommend another
    • The Bionic Knee Brace would offer good support for the PCL as it has bilateral hinges and should not limit activities.
  • Ana at 6/24/2016 5:01 PM
    • I'm recovering from an ACL/meniscus surgery (soon to be cleared for playing)and I would like to know which brace would be the best choice?
      I need something that will provide me protection but that won't limit my movement too much.
    • The DonJoy Performance Bionic Knee Brace will not offer the ACL support you need after surgery, you may want to consider the DonJoy Performance Bionic Full Stop Brace, https://www.betterbraces.com/donjoy-performance-bionic-fullstop-knee-brace , which should still allow the movement you are looking for.
  • Drew Holthaus at 6/24/2016 1:04 PM
    • I'm a teenager with a rare knee condition called osteochondritis dissecan (ocd knee lesion). It isn't widely known about and I've had multiple surgeries with none fixing it. Would this brace help relieve some of the pain?
    • The DonJoy Bionic Knee Brace would help if you are also looking for stability and extra support, otherwise a DonJoy Reaction Web would provide the Patella stabilization needed for osteochondritis dissecan.
  • Rick at 6/24/2016 12:59 AM
    • My father had polio as a child and was told he would never walk. Well he beat the odds and has walked my entire life and I'm 47. He is an amazing person but lately his knee gives out and causes him to fall. He is now 74 and wears a run of the mill Wal-Mart brace. One of the problems is the polio causes all muscle in the right leg to atrophy; from the hip to the calf so fitment may be an issue. Could you recommend a brace that would adjust (sorry no measurements right now but his leg is very small in circumference) and assist in stopping his knee from giving away?
    • The Bionic Knee Brace would be suitable, however it sounds like he may need a bit more stability. I would suggest taking a look at the Donjoy Performance Bionic FullStop https://www.donjoyperformance.com/bionic-fullstop-knee-brace. This brace will give maximum joint stability and the length of the brace will also aid in supporting his atrophied muscles
  • Marta at 6/22/2016 12:47 PM
    • Hi, I am volleyball player, in January i torn my cruciate ligament (ACL). My stability is good and i am able to carry on without surgery. I am still busy with rebuilding all the muscles in the injured knee. I I am looking for an ACL brace that will help me to get back to play volleyball again ( I need sport brace) as well as help me to gain the confidence and allow me to play volleyball at the same levels. Is this brace suitable for this type of injury?
    • The Bionic Knee Brace is used more for MCL/LCL instabilities. You could try the Playmaker ll which you can find on the website BetterBraces.com
      It will help prevent further injury to the knee. The fourcepoint hinges train your knee to stay out of the "at risk" position for the ACL. This will also help to prevent a more serious injury.
  • Javier at 5/11/2016 12:20 PM
    • I have the next messurments, what size of BIONIC KNEE BRACE should I buy.
      Thight: 19
      knee center 15 3/4
      Calf: 16

      Thank you
    • The medium would be the correct size for those measurments
  • Suzi at 4/8/2016 8:25 PM
    • I play roller derby, I have had MCL injuries in both knees. I am looking for a brace that will fit comfortably under the required knee pads for my sport, while providing the most protection. Is the bionic knee brace the best choice?
    • The Bionic Knee Brace will provide support to your medial and lateral ligaments and is a great option for an MCL injury. As long as your knee pads are either wrap-around or stretchy they should fit on top of the Bionic knee brace.
  • Diva Runner at 3/31/2016 8:34 PM
    • I have an MCL sprain on both my knees. Would this be the best brace for me to train & run in during my marathons?
    • Yes a hinged knee brace such as the bionic knee brace will be sufficient for MCL sprains
  • Hunter waggener at 3/20/2016 3:08 PM
    • I wear the Don Joy armor knee brace for my torn ACL. And it slips and slides and is very un comfortable. Would this be good to wear for more comfort?
    • The Bionic Knee does not provide ACL specific support. For ACL support we recommend the Bionic Fullstop Knee Brace https://www.donjoyperformance.com/bionic-fullstop-knee-brace
  • JP at 3/15/2016 8:04 AM
    • I am part of a racing ski team (mostly giant slalom and slalom) and my left knee has shown some weakness due to a tear of the posterior horn and body of the medial meniscus. No issues with my ACL/MCL. Which one would you recommend between the bionic knee brace and the webteck brace? Thank you
    • The Bionic would be the better choice as it will offer both medial and lateral support for the knee
  • D L at 3/3/2016 12:26 PM
    • im looking for my best option for a contact sport knee brace that has overall ligament protection for my sons right knee. he is a yr out of ACL surgery on his left knee and uses your Armor brace as prescribed from the surgeon. we are looking at the bionic and the bionic full stop braces, lacrosse season starts and we want to do what we can to prevent another injury.
    • The brace he is currently wearing, the Don Joy Armor is the best brace for him to wear during athletic competition to protect the ACL and prevent another injury.
  • Carlos at 2/22/2016 11:22 PM
    • I play basketball and run marathons I just had a meniscus tear and chipped cartilage on my right knee surgery was done and now I'm looking for a knee brace for support and to help ease the pain and swelling would this be the right knee brace?
    • The Bionic Knee Brace will provide general stability for the knee and compression as well
  • Robert MacEwen at 2/20/2016 6:28 PM
    • "Bilateral polycentric hinges". What are these made from please? I have to pass through metal detectors where I work. I wear a knee brace every day (metal stabilizers removed) because of all the walking I have to do. A quality brace that doesn't trip the detectors would be much more effective.
      Thank you.
    • The hinges are made of aluminim
  • Maggie at 2/11/2016 10:34 AM
    • I play rugby, and the knee brace regulations are pretty strict. Does this brace have metal supports?
    • Yes it does have metal hinges
  • Mark at 1/20/2016 2:11 PM
    • I purchased the bionic knee brace and it works great. I threw away the box and was wondering if there were any washing instructions.

    • Wash by hand with a mild soap and let it air dry
  • Maria Freitag at 12/31/2015 9:04 PM
    • I'm 5 weeks post injury --tibial plateau fracture, grade 2 MCL tear and meniscus tear. Will this be a good brace to wear when I return to skiing in a month or two? I intend to ski aggressively (ski patroller and ex college racer)
    • The Bionic Knee Brace will provide both medial and lateral support to the knee and should provide support after those injuries. The brace will provide mild support while skiing
  • Robert Denison at 12/23/2015 9:04 PM
    • i have a discoid meniscus and will be skiing in February and I'm wondering if this is the best brace to keep my knee stable? If not which one would you recommend? My knee pops out of joint from time and locks up.
    • The Bionic has two hinges that will support both the medial and lateral side of the knee. This brace is the proper brace for a meniscus injury and it can be worn for skiing
  • Stephen almeda at 12/14/2015 9:33 AM
    • I had a total knee replacement on my left knee 4 weeks ago when I am weight bearing on my leg I present with genu valgum when I'm weight bearing (walking) ..placing stress on my MCL. I need a brace to counter the valgus moment. I want a brace that I can wear daily all day and will be comfortable. What would you recommend?
    • The Bionic Knee Brace will provide stability for the MCL since it has hinges on both the medial and lateral sides of the brace.
  • Gerard Nolan at 12/11/2015 5:39 AM
    • I had a complete right knee replacement last January and I have got a complication called complex regional pain syndrum which results in severe pain and stifnes in my knee I am attending pain management at the moment.The knee surgery was itself successful.
      What brace would you recommend to held with my daily activities and walking
      Gerard Nolan
    • The Webtech Knee Brace is a great brace for those who have anterior knee pain especially going up and down stairs. The webbing design absorbs forces on the knee and disperses them away so you have less pain. This might be a good brace to try.
  • Tanya at 12/4/2015 8:27 AM
    • I tore my MCL a little over a year ago playing volleyball and have started working out again. However, I am nervous to start playing sports again because I have had my knee slip medially a few times during activity. Will this brace help stabalize my knee for sports?
    • The Bionic Knee Brace will provide both medial and lateral support to your knee while you play volleyball and should be a good brace for preventing any further injury
  • Winston at 9/25/2015 8:26 PM
    • I popped my knee out of place about almost 2 month ago and I am now able to run full speed. However I still get nervous when I am running side to side and cutting . I am looking for the best knees brace. Please help me out thank u
    • Winston
      The bionic Knee brace offers general knee stability especially with side to side movement and twisting. If your kneecap "popped out" of dislocated you may want to take a look at the Webtech knee brace to prevent this from happening again. The Webtech Knee brace will help keep the kneecap stay in the correct position.
  • Anthony at 9/17/2015 1:36 PM
    • I am 4 months post op from a lateral meniscus tear/surgery. While I don't see myself using this for lifting, I do see it being useful for soccer. I am going through PT still to improve strength, mobility, and endurance, do you believe this or the webtech would be better?

      My major issue is my patella does not move much, causing pressure to build above and around it.

      Thank you!
    • Anthony
      If the problem you are having is around your patella, the Webtech Knee Brace would be a better choice for you. The Webtech will support the anterior knee and decrease anterior knee pain.
  • JoAnn Allender at 9/16/2015 11:00 AM
    • My son has an impaction fracture of the tibial plateau. What is the best brace for this injury? He is a Quarterback and is still having pain when he drops back to pass and when he jogs.

      thank you,
    • JoAnn
      The Bionic Knee Brace will provide bothe medial and lateral support for your sons knee while playing football. This general knee support should be suffcicient for someone with that injury
  • Val at 9/3/2015 8:02 AM
    • I've had surgery to repair an ACL tear, and I want a brace that I can wear for obstacle course racing (such as the Spartan). I currently use the Defiance III Custom brace for non mud run races, and the Armor (because it's less expensive than my custom brace) for the mud runs. The hinges are difficult to clean properly so I'm looking for more of a fabric brace for support. Is this a good choice?
    • Val
      If you are not going to wear the rigid braces then the Playmaker or Playmaker II would be the next step down in bracing for you.
      http://www.betterbraces.com/donjoy-playmaker-ii-knee-brace http://www.betterbraces.com/donjoy-playmaker-knee-brace
  • James at 8/28/2015 8:10 AM
    • I just purchased two trizone elbow braces and they seem large. My bicep is 13.5-14 at mid point, but the braces seem to cover a large part of my arm and the sleeve at the forearm seems loose. Based on your size chart I bought size large. They do not feel too tight or loose, but I was curious as to how they should fit and if perhaps my arms are maybe too short (the sleeve comes almost to my armpit). Thanks.
    • James
      The sleeves should provide compression around the arm but they do not need to be so tight as to be uncomfortable. The length of the sleeve does not differ based on size so a smaller size might just be too tight.
  • Ryan at 8/24/2015 10:26 AM
    • im playing football and the doctor said thaa i might have kinda tore my ACL would this help stableize it so i can play still?
    • Hello,

      Thank you for contacting Donjoy. If you have been cleared to play football with an ACL deficient knee, you will require an ACL Brace. Click on this link to see your options for an ACL brace. http://www.betterbraces.com/knee-braces/rigid-hinged-braces
      For football we recommend using the most rigid brace which is either the Custom Defiance or the Armor knee brace. If you are non-contact athlete you can use a brace that is a little more malleable like the Full-fource, Legend, SE4. Feel free to contact us with additional questions 888-405-3251.

      Have a Great Day.
  • robert Lewis at 8/18/2015 12:34 AM
    • Would this be a good choice for me. I hurt my knee long jumping during track back in 2012. I sustained medial/lateral miniscus damage , chipped cartilage , and strained ligaments. Its only the inside of mt knee that ever gives me problems but its rare that it happens. An only happens when i try to run routes also swells up pretty instantly. Would this kind of brace be suggested ?. HELP! Thank you.
    • Robert
      Yes this brace would provide the support you would need for your knee
  • Eddie at 7/28/2015 4:38 AM
  • Skye at 7/7/2015 4:12 PM
    • I have had LCL, ACL, and PCL surgery and have been using the reconstruction brace and am looking for the next phase of braces to play soccer in. Is this something that could be of use to me?
    • Hello Skye,
      The Bionic Knee would be a more mild level of support, and might not offer the protection you are looking for. If you are coming from a rigid brace and want to step down then I would suggest the DonJoy Playmaker II Knee Brace. It will provide better support and protection, and is great for sports like soccer.

      link: http://www.betterbraces.com/donjoy-playmaker-ii-knee-brace


Bionic Knee Brace

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    Customer Reviews 40 item(s)

    Great Knee Brace with Comfort

    Reviewed by:
    Verified Purchase
    Having and using the Defiance111 custom on my R knee, I felt after talking with my Ortho Dr. that the Bionic knee would best suit me for my Left knee. Having no cartilage left in my knee and severe Osteoarthitius, with bone chips and ligament damage. I needed something to be able to keep me working with support. 2 days before receiving my Bionic Brace I was injected with Monovisc. Prior to that and to no relief I was getting cortisone injections frequently as prescribed. The combination of Bionic Brace and injection is amazing. My work activity required a fast paced walk nightly of 11-16 miles in 6hrs. That came to a halt 3 months prior.
    Now with the combination thankfully I am back up to 9-12 miles a night.

    I am forever sold on Donjoy for any of my extremity needs if needed, (hopefully not) but will always refer to DonJoy for my ortho stability when needed!
    Pros: Great stability inforcement and adsuridty of my knee
    Cons: How to wash it. Also, when ordering the Bionic Knee Brace the advertisement stated also a "special gift" ??? Didn't receive :(
    Share Your Usage: Preventing Injury, Recently Injured, Chronic Instability, Daily Use
    Posted on August 27, 2017

    Torn meniscus support and comfort

    Reviewed by:
    Verified Purchase
    I suffer a torn meniscus. After the initial pain and swelling, I was determined to strengthen the leg and muscles around the knee.

    I ordered this brace through the injury search. It provides the lateral stability I need and want to stay active. I haven't tried running again.. but I bike I do yoga (can't sit on my heels at all, don't know if that will ever come back) I deep squat.

    Meniscus pain is pretty specific and hard to avoid even with a brace, but this brace provides a nice compression element that process comfort and the stiff side hinges give me the confidence to not be worried about my knee every second.
    Pros: Lateral support Compression element Comfortable
    Cons: Pinches at first Sweaty
    Share Your Usage: Recently Injured, Recovering from Injury, Daily Use
    Posted on August 14, 2017

    Excellent Support

    Reviewed by:
    Verified Purchase
    Very pleased with the brace. Its comfortable and provides excellent support.
    Pros: Lightweight
    Cons: Has to be adjusted just right or it will slip.
    Share Your Usage: Recovering from Injury, Sports
    Posted on August 13, 2017
    Reviewed by:
    Verified Purchase
    I sprained my MCL in NY right knee. This brace has been great for supporting the knee and guiding it to only move in the correct direction.
    Pros: Easy to put on/take off. Low profile to fit under skirts and pants.
    Share Your Usage: Recovering from Injury, Daily Use
    Posted on July 26, 2017

    Good brace but tears at seams

    Reviewed by:
    Verified Purchase
    This has been a great brace for my knee, but after 3 months of use the lower piping holding the metal bracket in place started to tear. I still use the brace but the metal bracket does slide out when I teach fitness classes.

    I am a very active person and use this brace multiple times every day. Wish it could last me longer as the price for a replacement is not cheap.
    Pros: Great support, and easy to put on and take off after use.
    Cons: Tears at seams if used frequently.
    Posted on July 6, 2017
    Dear Andrew,

    Thanks for the great feedback.

    Note that DonJoy Performance products have a 6 month guarantee warranty from purchase date.

    Just contact us at 844-331-7767 and ask for warranty replacement.


    DonJoy Performance Customer Service Team
    07 Jul, 2017

    Size is too small

    Reviewed by:
    Verified Purchase
    This brace could be a sturdy brace, but although I got one according to the size chart and went up a size, the velcro in the back of the knee won't close correctly so the support is not as good as I would like it to be. I had to return it and get another style in a larger size and hope that the other one will work.
    Pros: Velcro straps for easy wear and removal. Enough padding for support.
    Cons: Size is too small, velcro won't close all the way to stay in place.
    Share Your Usage: Chronic Instability, Daily Use
    Posted on May 27, 2017

    Great brace with good support

    Reviewed by:
    Verified Purchase
    I bought this brace after having a torn meniscus and weakness in my knee. The brace with the bilateral hinges help support the joint when running and jumping the strengthen my knee. Getting back to activities haven't done in years has been great!
    Pros: Easy to put on and take off Support Open patella to allow movement
    Cons: Pull up tabs are a little small
    Share Your Usage: Recovering from Injury, Occasional Use, Sports
    Posted on May 24, 2017

    Very comfortable and stays in place!

    Reviewed by:
    Verified Purchase
    I was a bit skeptical about this brace, but gave it a try. I wore it all day while working and at home. It stayed in place while doing all types of activities: walking, sitting, pushing carts, moving boxes etc
    Pros: Stay in place, comfortable and affordable
    Cons: I haven't found one yet!
    Share Your Usage: Preventing Injury, Recently Injured, Recovering from Injury, Chronic Instability, Daily Use, Occasional Use, Sports
    Posted on May 12, 2017

    doesn't fit well for short people

    Reviewed by:
    Verified Purchase
    I am average height, but have short legs. This brace was too long for me to wear and the fit was small. I have other Don Joy braces that slide on and they are tight but fit well.
    Pros: sturdy product
    Cons: a bit long for short legged people
    Share Your Usage: Chronic Instability, Sports
    Posted on May 11, 2017

    Absolutely Outstanding Brace for My Injured Knee

    Reviewed by:
    Verified Purchase
    I tried every brace (including a made to measure one) you can think of for my injured knee.

    Donjoy Performance Bionic of the right size fitted live glove for not only my daily routine but also my golf. It has been an excellent acquisition.
    Pros: The brace has been an effective support for my injured knee. Unfortunately..It is not for permanent use as my injury real requires a knee replacement.
    Cons:  Can not think of anything but key ones are: - no instructions - no guide how to get it washed (whether hand wash or it requires cold or hot washing machine wash)
    Share Your Usage: Recently Injured
    Posted on March 26, 2017
    Hi Ashwin Patel, thank you for your feedback. To wash your brace, please hand wash with mild soap and air dry. Thank you. -Customer Service
    29 Mar, 2017