This lightweight adluts cycling helmet is constructed from hard polycarbonate shell with shock-absorption EPS foam to provide maximum protection for you.It Features 15 air vents,adjustable dial,removable mesh liner,rear light,removable magnetic goggles that bring much protection for you. Features: Strong PC shell and EPS foam absorb shock and impact,provides better protection for you. Removable magnetic goggles reduce the harm of strong sunlight while protect your face and eyes from wind,sand and dust. Removable rear light with a built-in 130mAh rechargeable battery for warning and lighting in dark riding 3 lighting modes includes fast flashing mode,slow flashing mode andalways on mode. Adjustable dial makes the helmet fit head sizes: 58-61cm / 22.8-24.0in. Removable and washable mesh liner inside keeps helmet clean,fresh and odor free. 15 breathable flow vents keep you cool. Adjustable strap with chin pad for comfortable fit. Specification: Color: Black / Pink / White / Dark Grey / Light Blue / Dark Blue (optional) Material: EPS & PC Air vents: 15 Battery: 1* built-in 3.7v 130mAh li-ion battery Head circumference: 58 - 61 cm / 22.8 - 24.0 in Weight: approx. 375.2 g / 13.2 oz Package List: 1* Helmet 1* Magnetic Goggles 1* USB Cable