The Oneal Sinner Race Knee Protectors are packed with features...Specifications Include:The ultimate knee pads for riding in comfort all day longIPX protection is soft and pliable while riding, but hardens on impactFull length flexy zipper for ease of taking off and putting onSlim enough to be worn under pantsFast-wicking, breathable and quick-drying materialVelcro straps provide a slip resistant grip, helping pads stay in place during crashesPerforated neoprene for ventilation and comfortSoft and frictionless inner lining helps eliminate chaffing and improve comfort while ridingExceeds EN1621 safety standard