IMPACTO GELPRO Articulating Kneepads. Built using a solid injected polyurethane and Gel insert to provide comfortable knee cushioning and protection to the delicate patella bone. Enlarged outer shell with articulating feet grips the surface providing excellent stability. Strapping system positioned above and below the knee eliminates discomfort behind the knee. Elastic double straps (1.5 wide, top is 9 long, bottom is 8 inch; long without stretch). Quick clip plastic fastening system provides easy adjustment.