Our award winning Sinner just got even better, now with full length flexy zipper for easy taking off and putting on. Still the ultimate knee pads for riding in comfort all day long. IPX® protection is soft and pliable while riding, but hardens on impact the foam out-performs most/ all competitor foams on the market. Removable outer hard carbon-look shell on knee. Slim enough to be worn under pants. Fast-wicking, breathable, and quick-drying material. Velcro® straps provide a slip on resistant grip, helping pads stay in place during crashes. Perforated neoprene on inside of legs for ventilation and comfort. The soft inner lining does not rub during the trip and is comfortable. Certified to EN 1621-1. Kevlar® is a trademark of E. I. du Pont de Nemours and Company or one of its affiliates.