Adult Men Women Road Bike Helmet, Integrally-Molded Bicycle Helmet, Lightweight Breathable Cycling Helmet for Road & Mountain Biking, Suitable for Men Women

Impact Resisitance: The Bicycle Helmet is made of integrated dual PC shell and High-density EPS foam provide superior shock absorption. Built with a dual PC shell and integrated Molding for enhanced safety. The complies with CPSC 1203 and ASTM 1447.
Dual Adjustable Fit System: Adjustable rear dial and chin straps, adjust to fit for different size. 2 size available. Size M is 22.05″-22.83″(56-58cm),suitable for youth,teen,kids aged 8-14. Size Large is 22.83″-24.02″(58-61cm),suitable for adult,men,women
Air-Flow Ventilation Design: Equipped with multi-channel dense ventilation holes and aerodynamic streamline structure, it enables rapid heat dissipation and air circulation. You can keep your head dry and breathable even during long-time riding, saying goodbye to stuffy experience thoroughly.