Montbell Cycle Helmet UnisexA road bike helmet designed according to the shape of the Asian head. By carefully selecting the materials and materials, these helmets have achieved both excellent strength and overwhelming lightness. A lot of ventilation is provided on the cap body to reduce unpleasant stuffiness. You can attach a "helmet cover (sold separately)" to prevent rain from entering the helmet. Specs Material: Outer shell: Polycarbonate Inner shell: Expanded polystyrene