The ProFlex 360 Hard Shell Hinged Knee Pads feature an ergonomic hinge design that is built to keep protection comfortably in place whether walking, crawling or kneeling. The combination of a heavy-duty hard shell with a soft non-marring cap makes these pads versatile for protection on any indoor or outdoor surface—no matter how abrasive or delicate. Unlike other knee pads of this style on the market, the free-moving hinge design enables smooth and full 180-degree extension of the pad when straightening the knee. Thick closed-cell foam padding provides supportive all-day comfort, while the extra-large rubber cap maximizes surface area to increase stability and minimize risk of scratching or marking flooring such as tile or linoleum. Wide elastic straps easily adjust for a custom fit on a variety of leg sizes, and are designed to sit further apart on the thigh and calf to prevent uncomfortable binding.Note: This is a non-returnable item.