GOLDSTAR GS805 Men Cycling Bike PVC EPS Helmet The GOLDSTAR Bicycle Helmet Advantage: Adopt professional high-density EPS foam materials, more safer, more Lighter, more comfortable; New advanced integrally molding technology, In-Mold polycarbonate shell with EPS liner With 24 wind tunnel vents to keep your head cool, Moisture-wicking pads keep you dry, Streamlined design Built-in Insect prevention net and removable visor offer you a comfortable ride under various situation, All round protection and stylish appearance design Unique night riding light model keep you safe, Twisted button design with adjustable head circumference system Security certificate: CE approval; Suitable head size: 23-25 inch(57-62cm)