AltaCONTOUR Knee Pad with original AltaLOK fasteners is made from strong durable Cordura nylon fabric and a Non-Slip-Strip that helps pad stay in place through range of motion. Additionally this design helps reduce bunching behind the knees. Biomechanically-designed, offers great knee motion and comfortable fit. Extra flexible with sectional foam padding. Soft coyote flexible cap provides protection and flexibility. Compression recovery 1/2" Neoprene foam padding provides firm, consistent support without bottoming out. Finished brushed tricot liner wicks away moisture and keeps out dirt and debris Non-Slip Rubber Strip on back inside to hold comfortably in place. Widely-set dual strapping system to avoid bunching and provide extra comfort Unique Alta Strapkeeper System to secure excess straps from flapping. Adjustable to fit most sizes.