Features1Strong plastic shell and EPS foam absorb shock and impact,provides better conservation for you. 2Detachable magnetic goggles reduce the harm of strong sunlight while keep your face and eyes from wind,sand and dust. 3Adjustable dial and larger head circumference fit most head sizes: 58-65cm(22.8-25.6\"). 49 switchable lighting modes meet your different demands. 5Removable and washable mesh liner inside keeps helmet clean,fresh and odor free. 618 breathable flow vents keep you cool. 7Adjustable strap with chin pad for comfortable fit.SpecificationImpact resistant plastic hard shell with high density EPS foam to protect your head from unexpected injury,detachable magnetic goggles can block out harmful sunlight.A nice bike helmet for your riding trip!Features:Strong plastic shell and EPS foam absorb shock and impact,provides better conservation for you.Detachable magnetic goggles reduce the harm of strong sunlight while keep your face and eyes from wind,sand and dust.Adjustable dial and larger head circumference fit most head sizes: 58-65cm(22.8-25.6").9 switchable lighting modes meet your different demands.Removable and washable mesh liner inside keeps helmet clean,fresh and odor free.18 breathable flow vents keep you cool.Adjustable strap with chin pad for comfortable fit.Specification:Color: Black / White / Grey (optional)Material: Plastic+EPSHead circumference: 58-65cm / 22.8-25.6inBattery: 220mAhCharging time: approx. 3hrsWorking time: approx. 6hrsAir Vents Quantity: 18pcsSize: 29*23.5*13.5cm / 11.4*9.3*5.3inWeight: approx. 290g / 0.6lbPackage size: 30*15.2*24.5cm / 11.8*6.0*9.6inPackage weight: approx. 358g / 0.8lbPackage List:1* Helmet1* USB Charging CablePackage List1* Helmet1* USB Charging Cable