Safety Design For Your Cycling [Materials & Construction]All of our Expandable Polystyrene (EPS) liner is imported from America and built in high density, which creates stronger impact resistant ability. Thicker polycarbonate (PC) outer shell is injection moulded with the EPS liner to provide the helmets with extra protection. [Fit System & Comfortable]The backside mini adjust dial is equipped to create smooth size adjustment. It can be easily rotated simply by one hand and is designed with vertical adjustment which offers perfect head fit. [Ventilation & Breathable]11 Vents provide good aerodynamic and coolest and happy cycling experience [Padding & Strap & Buckle]COOLMAX internal pads are used in larger surface in contact with the head for increased comfort. Detachable for hand wash and anti-allergenic.Nylon Strap breathable and strong.Buckle Locked for your safety. Design for your cycling - Material: PC EPS, In-mould Construction - EPS Foam Desnity: 280g, HIGH DENSITY, more stronger & reliable - Inner Pads: Washable comfort pads Buyer Show Q & A: Wholesale and tug boats are welcome For wholesale, we will provide discounts and inform the best way to transport, reach a short time. What should I if I don't receive my items? Please contact us first, we will track your items. If you can't receive , we will refund the full refund or resend you. We are honest sellers, so don't worry. What should I do if the product has a problem? Please contact us in time, we will help you solve it. Is this helmet suitable for my head circumference? This ski helmet adopts standard size, the head circumference can be adjusted to the best.