Bicycle helmets and their parts and accessories; motorcycle helmets and their parts and accessories; automotive helmets and their parts and accessories; protective helmets and their parts and accessories; bicycle racing helmets and their parts and accessories; helmets for bicycle motocross (BMX) and their parts and accessories; ski helmets and their parts and accessories; helmets for alpine sports and their parts and accessories; helmets for ski jumpers and their parts and accessories; motorcycle racing helmets and their parts and accessories; automobile racing helmets and their parts and accessories; protective helmets for sports and their parts and accessories.