Product Review

The DonJoy Reaction Knee Undersleeve replacement is made of 85% nylon/15% spandex. Compatible with the DonJoy Reaction WEB and the DonJoy OA Reaction WEB knee braces. To ensure a proper fit, take the measurement of your thigh and calf, 6 inches above and below your kneecap using a flexible type tape measure. Use the circumference you measure to choose your size. The DonJoy Reaction Undersleeve runs small. Should you measure between sizes, we recommend going up one size for optimum comfort and fit.