Features: OPEN-PATELLA DESIGN relieves pressure and reduces stress on the knee-joint during intense exercise and heavy usage; effectively relieves acute & chronic knee pain from arthritis, strains, sprains, and fatigue; ideal for post-surgery recovery or preventing sports injuries. 1) Material: Polyester/Velcro/Springs.Durable.2) Well relieve stress on your knees during exercise,avoiding strains.3) Breathable,comfortable to wear, you can wear it inside or outside the clothes.4) Adjustable Velco straps can be attached to almost any exterior point, preventing slippage.5) Reversible design, It can be worn on either left or right knee.6) Good for Running/Work Out/Exercise/Hiking/Cycling/Basketball/Football,etc.Size: One size fits all (Men/Women/Adult/Youth).Knee circumference:12-18 inchPackage Included: For 1 X Knee Brace