Motorcycle Helmets YM626 Open Face Helmet with Shield,DOT Approved Size for 21.2"-23.6" Black Open face, 3/4 design shell offers protection combined with a wide field of visibility Flip-up, night vision shield, Night driving is necessary 1.38inches thick lining with Two Adjustable, flow-through ventilation make you feel more comfotable and keep you warm. Size for 21.25"-22.8" DOT approval