Gel-Tek™ Stabili-Cap™ Articulated Kneepads, Buckle Style, Plastic Caps, Gel PadsPair Injection molded polyurethane and gel technology give the Contour Fit Knee Cups unsurpassed all day comfort and support Stabili Cap design provides a solid kneeling base and also allows for easier forward movement, effectively increasing the user's range of motion Articulated straps are configured to allow kneepads to "float" over the knees when standing, require less strap adjustment, and provide greater all day comfort than traditional strap