GIRO SYNTAX MIPS ROAD BIKE HELMETNO SYNTAX ERRORS HEREWhen it comes to racing your road bike, you want to make sure you have a lightweight helmet that is aerodynamic and well protected. The Giro Syntax MIPS Road Bike Helmet that is a lightweight helmet that has slightly deeper coverage and high-performance features. It has a molded, tough polycarbonate outer shell and an EPS foam liner. It features a highly-adjustable Roc Loc 5 Air MIPS system so you can dial in the perfect fit. The MIPS system helps redirect impact energy. Features MIPS technology helps reduce forces from rotational impacts Hardbody(TM)two-piece wrap design fuses an exterior hard shell with a polycarbonate lower shell for additional durability25 Wind Tunnel vents keeps you cool even at slower speeds Roc Loc(R) 5 Air Fitretention system allows riders to dial in the perfect fit, while providing exceptional airflow SPECIFICATIONSCore Material EPS Foam Closure system Roc Loc 5 Air MIPSSafety Certifications CPSCIntended Use Road Weight Sizing Size Extra Small Small Medium Large Extra Large Head Circumference (in)18. 5 - 20"20 - 21. 75"21. 75 - 23. 25"23. 25 - 24. 75"24 - 25. 55"Head Circumference (cm)47 - 51cm51 - 55cm55 - 59cm59 - 63cm61 - 65cm | Giro | Syntax Mips Road Bike Helmet