AWE AeroLite Men's Bicycle Helmet Black/Red 58-61cm FREE USB Light Worth Double In-Mould construction fuses the Polycarbonate outer Shell with Helmets Absorbing Foam Inner Core, giving an exceptionally Lightweight and Strong Helmet 24 Mega Cool Vents Pull Fresh Air In and Expel Stale and Warm Air Out, Keeping Your Head Cool At All Time. 58-61cm, Unisize Headlock System, Conforms to CE EN 1078 Standards, TUV Tested Protective Safety Mesh, Quick Release Buckle, Fully adjustable Locking Straps, Detachable Visor,Padded Chin Strap USB Rear Light: Compact 55x18x15mm Front Light: 12 Lumens, Waterproof Design, Tri-Positional Head, Quick Release Bracket, 1 x AweBrightTM Red LED, 600 Metre Visibility. Modes: On 3hrs/Flash 9hrs USB Rechargeable (No More Batteries!), Quick Release Bracket, Red Low Battery Indicator(= 30mins Run Time), Charge Time Up to 2 Hours, Recharge On PC Or Mac. 360 Rotational Bracket For Ease Of Charging, Adjustable Beam Angle By Rotating 360 Bracket