Zamp RZ-58 helmets are made of high-quality, composite fiberglass that creates a lightweight shell. They feature a 7-Top air hole system, along with chin and scalp vents and exhausts. They also come with a plush fire-retardant interior, a Z-20 Series 3mm shield with tear-off posts, predrilled holes for a neck restraint, and a removable and washable comfort liner. They even have two other holes for either music or hydration. So, if you need a top of the helmet, look no further than these Zamp RZ-58 helmets.