Sport DirectTM Bicycle Bike Cycle 18 Vent Graphite Helmet CE EN1078 TUV Approvals Helmet Size: 58-61cm, There Are An Amazing 18 Air Vents for maximum cooling (Including 7 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 Also Includes A Visor For Help To Keep All Weathers Elements From Within Your Eyes, The Helmet Is TUV Tested and conforms to EN 1078 standards