Sport DirectTM SHE501 47-52cm Children&#39;s Helmet - Pink Helmet Size: 48-52cm, There Are An Amazing 11 Air Vents for maximum cooling (Including 6 Rear) A Unisize Adjustment Headlock System At The Rear Of The Helmet Allows You To Make The Helmet The Perfect Fit Yourself The Helmet Includes A Padded Chin Strap Buckle Protector For A Comfortable Fit Around Your Chin The Helmet Has A Mesh Liner Over The Front Ventilation Holes To Protect From Wasp And Bee Stings The Helmet Is TUV Tested and conforms to EN 1078 standards