Advanced 3D woven patellar pouch with removable silicone ring relieves patellar pressure & enhances comfort. Four way stretch ensures quick healing, perfect fitting, uniform & effective compression. Multiaxial hinges help in walking and prevent product to roll down. Easy to use, long functional life, good aesthetics, soft feel, light weight & Anti slip. For correct size please measure circumference around mid thigh approx 6 inches above knee and refer corresponding size in size chart.