Bionic Knee Brace
DonJoy Performance
Maximum support for MCL, LCL, and meniscus injuries with padded bilateral hinges and open patella buttress for added knee stability. Bilateral polycentric hinges stabilize against lateral forces and prevent hyperextension. Breathable 4 mm neoprene and ergonomic wraparound design provide comfort with a secure fit for athletes and active adults.
Recommended for:
- 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 and Benefits:
Polycentric Hinges
Bilateral polycentric hinges protect knee ligaments from lateral forces and hyperextension4 mm Perforated Neoprene
Optimal balance of firm compression, therapeutic warmth, and breathabilityAdjustable Thigh & Calf Straps
Increases ligament stability with secure, customizable compression that adapts to movementOpen Hex Buttress
Open hex foam buttress stabilizes the kneecap, relieves pressure, and supports natural movementOpen Popliteal
Improves breathability and comfortable fit behind the kneeReflective Details
Enhanced visibility in low light conditions
Is this brace right for me?
The DonJoy Performance Bionicâ„¢ Knee Brace is designed for athletes and active adults who need maximum support and confidence during recovery or sport. Part of the BIONICâ„¢ series, trusted by top athletes, this wraparound style brace features bilateral polycentric hinges to stabilize the knee against lateral forces and an open hex buttress for targeted patella support. The 4 mm perforated neoprene retains heat for recovery yet remains breathable for comfort during activity. Fully adjustable straps provide compression and prevent slipping. Ergonomic design makes it easy to wear for extended periods.
The DonJoy Performance Bionicâ„¢ Knee Brace helps prevent:
- Hyperextension
- Provides maximum support for the MCL and LCL
- Supports meniscus injuries
This brace is ideal for sports involving cutting, jumping, and sprinting.
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) |
How To:
Brace Application Guide
Loosen both straps so the brace lays flat, then place it over the knee and center your kneecap in the hex-shaped patella opening. Secure the top and bottom hook panels so the brace sits smoothly against the leg, then confirm the bilateral hinges are aligned evenly along the sides of the knee. Thread the stretch webbing straps through the D‑ring tensioners and tighten evenly to your preferred level of support.
To receive maximum therapeutic support, the knee brace should feel snug and supportive without being excessively tight or restricting circulation.
Download product details.
Product Care
Hand wash in warm water using mild soap. Rinse thoroughly. AIR DRY.
Note: If not rinsed throroughly, residual soap may cause irritation and deteriorate material.
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Special Price $61.99 Regular Price $68.99On Sale 10% Off Save $7.00(3) ReviewsMaximum lateral support with dual polycentric hinges for stability and improved patella tracking. Low-profile wraparound style brace with neoprene and terrycloth lining deliver breathable comfort for all-day wear. Open hex buttress provides gentle compression and kneecap stability, making this brace ideal for athletes and active adults.
Recommended for:
- 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) ReviewsModerate support with polycentric hinges for ligament stability and a natural gait. Mesh popliteal and open patella design with donut enhance comfort and targeted kneecap support. Moisture-wicking Drytex material and adjustable straps provide an ideal customized and comfortable fit. Ideal for athletes and active adults.
Recommended for:
- 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





