Gonex Mountain Road Bike Helmet, Bicycle Helmet Large Fits 54-65 centimeter Color:Black+Blue Material:Housing:high quality 0.8mm PC + silk printing; Inner casing:gray 85EPS (high-density foaming / imported materials) integrally molded. Size:about 26 x 22 x 15cm;Weight:238g. Head circumference:about 54-64cm adjustable. Features:streamlined design, anti-windage, lightweight, strong, 22-hole breathable big holes, with visor, comfortable lining, with regulator.