AN ICON MADE EVEN BETTER THE SYNTHE MIPS® II IS AN ICON, UPDATED TO BE LIGHTER AND MORE COMFORTABLE THAN EVER BEFORE. THE COMPACT DESIGN SLIPS THROUGH THE AIR WITH EASE, YET OFFERS IMPRESSIVE COOLING POWER IN A LIGHT-YET-DURABLE DESIGN THAT'S BEEN A RIDER FAVORITE FOR YEARS NOW. IT'S PACKED WITH OUR BEST FEATURES, INCLUDING THE ROC LOC 5 AIR MIPS FIT SYSTEM WITH 2-WAY FIT TUNING AND INTEGRATED MIPS (THE MULTI-DIRECTIONAL IMPACT PROTECTION SYSTEM), THE MARKET-LEADING SYSTEM DESIGNED TO REDIRECT ROTATIONAL FORCES AWAY FROM THE BRAIN AND PROVIDE MORE PROTECTION IN CERTAIN IMPACTS. CIRCUMFERENCE 51-55 CM CONSTRUCTION IN-MOLD POLYCARBONATE SHELL WITH EPS LINER THERMOFORMED SL ROLL CAGE REINFORCEMENT VENTILATION 19 WIND TUNNEL VENTS WITH INTERNAL CHANNELING FIT SYSTEM ROC LOC® 5 AIR MIPS® PRODUCT WEIGHT 275G (SIZE MEDIUM CPSC)|265G (SIZE MEDIUM CE) CERTIFICATION COMPLIES WITH THE US CPSC SAFETY STANDARD FOR BICYCLE HELMET FOR PERSONS AGE 5 AND OLDER E.U.: CE EN1078 HIGHLIGHTS FEATHERWEIGHT WEBBING WITH SLIMLINE™ BUCKLE IONIC+™ ANTI-MICROBIAL PADDING