STRAUSS Adjustable Knee Support Patella, Free Size (Black/Red), Pair Opening relieves pressure on patella Open patella (kneecap opening) for proper flexion of the knee joint Made of stretchable fabric for compression and comfort This Knee support comes with oval pad for extra protection at knee joint. Neoprene material helps retain body heat to warm knee joint and aids blood circulation Overstitched edge for secure fastening Helps relieve muscle aches, strain and sprain Fits right and left knee Ideal for better gripping.Size Fits From 21.29 - 50.8 CM (11.5 - 20 inches) .