GMAX GM35 Fully Dressed Adult Harley Motorcycle Helmet - Derk Flat Black / Small GMAX GM35 Fully Dressed Half Helmet features a lightweight, injection-molded polycarbonate shell for Street and Cruiser enthusiast. Sleek new shape. Clear coated, painted shell. New high-tech Coolmax interior moves moisture from the head, keeps you cool and comfortable. Removable zip out rear neck curtain for added warmth.