Gonex Bike Helmet, Adult Youth Road/Mountain Helmet, Lightweight Colorful(Pink) Color:Pink Material:Housing:high quality 0.8mm PC + silk printing; Inner casing:gray 85EPS (high-density foaming / imported materials) integrally molded. Size:about 28 x 21 x 15cm;Weight:215g. Head circumference:about 57-62cm adjustable. Features:streamlined design, anti-windage, lightweight, strong, 18-hole breathable big holes, with visor, comfortable lining, with regulator.