Data sheet: 3 size caps. Outer shell in three-component material (kevlar-Carbon-Fiberglass). Interior made of hypoallergenic fabric. External anti-scratch polycarbonate visor. Rapid visor removal mechanism. ECE 22.05 and DOT US approval. Ducted system of internal ventilation. Excellent closing Double ring D. Internal polystyrene with multiple density. Visor thickness 2.2mm. Weight 1400 + -50G.