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The DonJoy Reaction knee brace utilizes an elastomeric web design, which absorbs shock and shifts the peak loads away from the painful area of the knee. This dispersion of energy helps reduce the anterior knee pain you suffer from.
Another advantage of the elastomeric web is it dynamically stabilizes the patella on all sides, thus bringing the patella into proper tracking position to reduce pain caused by general patellofemoral instabilities.
The DonJoy Reaction knee brace is extremely comfortable to wear because the open framework of the elastomeric web and mesh backing makes the brace breathable, unlike the traditional elastic and neoprene sleeves.
Sizes: Available in sizes: XS/S, M/L, and XL/XXL and XXXL. Click on Size Chart tab above for sizing info.
Accessory: To Order the Reaction Knee Undersleeve Click Here

Shop our complete selection of knee braces or browse additional DonJoy products.
Take the measurement of your thigh 6" above your kneecap using a flexible type tape measure. Use the diameter to choose your size.
| Size | Thigh |
| XS/SM | 13" - 18 1/2" |
| M/L | 18 1/2" - 23 1/2" |
| XL/XXL | 23 1/2"- 29 1/2" |
| XXXL | 29 1/2"- 32" |
