The O'Neal Sinner Elbow Guard is the ultimate knee pad for riding in comfort all day long. The protector is soft and pliable while riding, but hardens on impact. It is made of fast-wicking, breathable, and quick-drying material. The perforated neoprene on inside of arms provide ventilation and comfort. The elastic Velcro® straps provide a slip resistant grip, helping pads stay in place during crashes. Soft and frictionless inner lining helps eliminate chaffing and improve comfort while riding, event under a jersey. Exceeds EN1621 safety standard.