ADVANCED PERFORMANCE FOR THE ADVENTUROUS The heart of the Helioss extraordinary design & performance is Spherical Technology which utilizes a ball-&-socket design powered by Mips the market-leading brain protection system that can help to reduce rotational forces. Spherical Technology allows the helmets outer liner to rotate around the inner liner during a crash & also allows Progressive Layering of the inner & outer liners to provide more comprehensive protection & performance. In addition to advanced head protection the Helioss 15 Wind Tunnel vents provide exceptional cooling power thats enhanced by our patented Roc Loc 5 Air fit system & plush antimicrobial XT2 padding for exceptional sweat absorption. Its the ideal match for your road & gravel adventures. SPECS CONSTRUCTION INDEPENDENT IN-MOLD LINERS WITH SPHERICAL BALL-&-SOCKET DESIGN POLYCARBONATE SHELL HARDBODY™ LOWER SHELL VENTILATION 15 WIND TUNNEL VENTS WITH INTERNAL CHANNELING FIT SYSTEM ROC LOC 5 AIR PRODUCT WEIGHT 270 (SIZE MEDIUM CPSC CE) CERTIFICATION COMPLIES WITH THE US CPSC SAFETY STANDARD FOR BICYCLE HELMET FOR PERSONS AGE 5 & OLDER E.U.: CE EN1078 HIGHLIGHTS NANOBEAD EPS FOAM COOLFIT ANTIMICROBIAL PADDING SLIMLINE WEBBING FOUR-PIECE SHELL W/LOWER HARDBODY