Brand: Rockbros Model: wt-09 Weight : Net weight about 350g Outer Material:PC+EPS Size Tips : 57-62cm Head Circumference Color: Black/ Grey Titanium / Blue Gender: Unisex Adult Type: Commuter/Leisure Features:Adjustable Fitting, Detachable Visor, Reflector, Visor Integrally-moded,Aerodynamic,Breathable, Ultralight Sport Type : Cycling, Riding, Parallel Car, Motorcycle helmet