AWE AWEAir Free 5 Year Crash Replacement in Mould Adult Mens Cycling Helmet Large Green, Black US CPSC Standards 16 CFR 1203 Safety Tested HELMET SIZE: 58-61cm(22.83-24.01Inches). A Unisize Adjustment Headlock System At The Rear Of The Helmet Allows You To Make The Helmet The Perfect Fit Yourself. Side Straps Will Increase/Decrease The Size To Your Liking VENTILATION: There Are An Amazing 18 Air Vents for maximum cooling (Including 6 Rear). Front Mesh Is In Moulded To The Front Vents For Prevention Of Bee And Wasp Stings MATERIAL: Its In-Mould Construction fuses the Polycarbonate Outer Shell With The Helmets Absorbing EPS Foam Inner Core, giving an exceptionally Lightweight and Strong Helmet. Dual-density EPS liner. LIGHTWEIGHT: Incredible lightweight material = 270g Making This Hardly Noticeable Whilst Cycling TESTING APPROVAL: The Helmet Is tested for CPSC 5+ year old safety standard certification (CPSC 16 CFR 1203) for bicycle helmets for persons age 5 and older. TUV Tested and conforms to CE EN 1078 standards