Great for use by carpenters, construction workers, floor layers etc to protect their knees from abrasion. Foam core gives maximum cushioning comfort: Super-thick, 1/2" high-density closed cell foam. Inner neoprene lining keeps moisture away from skin for extra comfort. Constructed of heavy duty 600D polyester fabric. Elastic upper straps with fasteners for rapid fit. Large, low-profile cap designed to prevent "roll over" onto hard surfaces. One size fits all.