S-Raw DOT Approved Motorcycle Helmet Goggles Gloves Gear Combo For Adult Motocross Helmet with Motocross Goggles Motorcycle Gloves Offroad Gear Combo ATV Dirt Bike MX Motorcycle Gear Combo Free Gloves & Goggles included! The helmet is DOT certified. Light weight ABS composite shell provides a balanced combination of mechanical toughness, good dimensional stability and heat-resistant. The reliable and tested double D-ring system ensures stability, safety and resistance. Ventilation system for optimum circulation. Internal polystyrene protective liner; the special shape and construction featuring differentiated density increases mechanical resistance in the event of accidental shocks. We suggest you choose a more larger size, as all of the off-road helmets are a little bit tight than standard size when they are designed. For example: if your head circumference is 58cm and is meant to choose "M" size according to the size table, we suggest you choose "XL". You will be more comfortable wearing a larger size helmet. Thanks. Please measure for size. Circumference of the largest part of your head, usually just above the eyebrows, or at whatever point gives the largest possible measurement. Label Size SMALL: 21.5-22 inches(55-56cm); MEDIUM: 22.5-23 inches(57-58cm); LARGE: 23.5 to 24 inches(59-60cm); XL: 24.5-25inches(61-62cm).