Giro Agilis MIPS Road Helmet - Matt Midnight-White-Red The perfect design for riders looking for a helmet that combines an airy design with slightly deeper coverage and a host of features designed for road and multi-surface riding Full wrap in-Mold Polycarbonate shell with EPS liner Integrated MIPS Technology Coolfit Anti-Microbial Padding Featherweight webbing with Slimline buckle Roc Loc 5.5 MIPS 32 Wind Tunnel vents with internal channeling Sizing: Small (20-21.75", 51-55cm); Medium ( 21.75-23.25", 55-59cm); Large (23.25-24.75", 59-63cm) Certification: Complies with the U.S. CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older