Bionic Knee Brace
DonJoy Performance
The Bionic Knee Brace can be used to treat or prevent the following knee injuries:
- MCL and LCL Instabilities
- Knee Hyperextension
- General Meniscus Support
Find the Right Fit:
- Stand with feet shoulder-width apart, knees slightly bent, leg muscles gently flexed.
- Place measuring tape flat against the skin (not tight). Measure leg circumference at:
- 6 inches above kneecap
- Center of kneecap
- 6 inches below kneecap
- Use chart to find your size. If you land between sizes—or if thigh and calf measurements suggest different sizes—choose the larger option.
A correctly sized brace will feel comfortably snug and supportive without being excessively tight.
| Size | Thigh | Knee Center | Calf |
|---|---|---|---|
| S | 15.5"-18.5" (39-47cm) | 13"-14" (33-36cm) | 12"-14" (30-36cm) |
| M | 18.5"-21" (47-53cm) | 14"-15" (36-38cm) | 14"-16" (36-41cm) |
| L | 21"-23.5" (53-60cm) | 15"-17" (38-43cm) | 16"-18" (41-46cm) |
| XL | 23.5"-26.5" (60-67cm) | 17"-19" (43-48cm) | 18"-20" (46-51cm) |
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Features & Benefits:
- Polycentric Hinge Support
- Soft hinges on both sides come with stops to help prevent hyperextension and support knee instability with lateral and medial protection
- Precision Fit & Ease-of-use
- Wraparound design with stretch webbing closure comes with easy-to-use pull tabs for personalized fit and adjustment
- Stash pocket
- Small stash pocket on backside allows you to carry your keys or cards as you go on your workout
- Breathable
- Designed with perforated neoprene for breathability
- Won’t slip
- Designed with anti-migration technology to help prevent your brace from slipping. No more stopping to pull up the brace after every step or jump.
- Reflective
- Stay safer with reflective spots built in so that you are visible in low light conditions: night running, late-nights on the basketball court, or even evening games out in the field.
Is the Bionic Knee Brace for me?
The Bionic Knee Brace is ideal for athletes looking for MCL and LCL support. It is not an ACL brace. It can also help with hyperextended knee injuries and meniscus support and works well for sports. Still not sure? Try our Brace Advisor for personalized product recommendations to meet your needs!
Designed to treat and protect:
- MCL or LCL Instabilities
- Knee Hyperextension
- General Meniscus Support
Best for:
- Basketball
- Baseball
- Hockey
- Soccer
- Volleyball
- Running
- Weightlifting
Our DONJOY Performance Bionic knee brace comes from one of the top bracing brands in the world, DONJOY. The Bionic line of bracing offers the highest level of support in our DONJOY Performance line of products. It offers bilateral polycentric hinges to help protect against lateral forces as you run, cut, and jump left and right. The hinges work by absorbing energy and impact as you move so that you can move freely and without restriction. Use the Bionic to help you continue your activities as you are recovering from injury and stay in the game.
View all DonJoy Performance braces or our full selection of knee braces.
Product Questions
Thanks. Peter
Find the Right Fit:
- Stand with feet shoulder-width apart, knees slightly bent, leg muscles gently flexed.
- Place measuring tape flat against the skin (not tight). Measure leg circumference at:
- 6 inches above kneecap
- Center of kneecap
- 6 inches below kneecap
- Use chart to find your size. If you land between sizes—or if thigh and calf measurements suggest different sizes—choose the larger option.
A correctly sized brace will feel comfortably snug and supportive without being excessively tight.
| Size | Thigh | Knee Center | Calf |
|---|---|---|---|
| S | 15.5"-18.5" (39-47cm) | 13"-14" (33-36cm) | 12"-14" (30-36cm) |
| M | 18.5"-21" (47-53cm) | 14"-15" (36-38cm) | 14"-16" (36-41cm) |
| L | 21"-23.5" (53-60cm) | 15"-17" (38-43cm) | 16"-18" (41-46cm) |
| XL | 23.5"-26.5" (60-67cm) | 17"-19" (43-48cm) | 18"-20" (46-51cm) |
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Special Price $61.99 Regular Price $68.99On Sale 10% Off Save $7.00(3) ReviewsLock in elite-level support through every cut and sprint. Dual aluminum polycentric hinges and hyperextension guards control lateral and medial instability—ideal for ACL, MCL, meniscus, or sprain rehab. Breathable neoprene with moisture-wicking terry lining, wrap-around fit, and anti-slip pads keep it snug, comfortable, and game-ready from kickoff to cool-down .The Bionic Comfort Hinged Knee Brace can be used to treat or prevent the following knee injuries:
- Meniscus Injury
- MCL and LCL Protection
- Knee Instability
- Hyperextension
- Strained Muscles or Tendons
- Sprained Ligaments
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Special Price $86.99 Regular Price $95.99On Sale 9% Off Save $9.00(11) ReviewsLock into performance-grade support with bilateral polycentric hinges. Moisture-wicking Drytex material and open-patella design keep you cool, agile, and on‑point through every cut and sprint. Adjustable top/bottom straps and anti-slip silicone hem ensure this brace stays put when you're pushing limits on the field or court.The Bionic Drytex Knee Sleeve can be used to treat or prevent the following knee injuries:
- Mild to Moderate MCL/LCL Injuries
- Meniscus Injuries
- Knee Instability
- Sprains and Strains
- Hyperextension
- Arthritis
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Special Price $69.99 Regular Price $77.99On Sale 10% Off Save $8.00(1) ReviewEngineered for athletes who demand mobility and support. The 4-way stretch knit fabric delivers compression to manage swelling, while removable plastic hinges provide medial/lateral stability during dynamic movements. Ideal for sports like basketball, volleyball, and soccer, this lightweight sleeve offers a secure fit with adjustable straps and a patella buttress to protect the kneecap.The Hinged Knit Knee can be used to treat or prevent the following knee injuries:
- Overuse Injuries
- Patella Tracking Disorder
- Muscle Imbalance
- Strained Muscle or Tendons
- Mild Sprains
- Blunt Trauma





