Roost XDiamond Atom Helmet Carbon Fluo. The Roost XDiamond Atom is a high-end, high-performance helmet from the Off-Road brand Roost. Designed with the latest technology for the practice of Off-Road, both in safety, as it includes the MIPS® system, and in comfort, since it has ventilation ducts that allow optimal ventilation in warm temperatures and at the same time not to get cold in winter temperatures. It has an easily removable and washable interior. Helmet with outer shell of carbon fiber and EPS composed of two different densities for greater protection. The visor of the helmet is adjustable with holes strategically placed to reduce air resistance.