Featuresr lightweight integrally molded eps bicycle helmet with pc outer shell impact resistantr special design of detachable pc shells makes it a skate or bike helmetr with a detachable goggle for great protection from wind and dustr 13 vents bring cool air in and flush warm air out well ventilatedr adjustable strap with removable chin pad and quick release buckler comfortable antibacterial padding inside detachable and washabler rotate the knob at the back of the helmet ensuring a pr