SVRG. Knee Sleeve protects your knees when doing sports, reduces pain and speeds up recovery from knee injuries. Made from the highest quality Premium Nylon and Spandex, SVRG. Knee Sleeve can stabilize and provide support to your knee. It is suitable for activities that involve a lot of stress on the joints such as Baseball, Basketball, Football, Golf, Gym, Hiking, Running, Tennis, Volleyball, and many more.