PROTEC Original Classic Helmet CPSC-Certified, Hosoi, Medium Certified helmet for skateboarding, bicycling, and a broad range of action sports with timeless skate style Stiff EPS foam liner provides; tough ABS shell 11 large vent openings to help keep your head cool during intense use; comfortable interior padding Easily adjustable soft nylon webbed straps; durable stainless steel rivets Complies with CPSC standards for biking and ASTM standards for skateboarding; also AS/NZS and CE certified