Melon Straight White Black Helmet, Black/White, Glossy Finish, Large, 58 - 63cm / 22.75 - 25in Head Size High-tech in-mold construction in a Classic shape, makes it 30% lighter, to comparable hard shell helmets Three base sizes are Available, each adjustable further through Coolmax pads and adjustment system, cover a range from 46-63cm 12 air inlets, air channels and a Fidlock magnetic buckle offer class Leading comfort Unique extra vista visor Available in 6 colours giving UV400 Protection Size:58cm-63cm/Head Size:22.75"-25"