Features1Impact-resistant polycarbonate shell with EPS foam absorbs shock. 2Detachable sun visor provides shade for your eyes. 318 vents keep your head cool and reduce wind friction. 4Super bright LED rear light for good visibility and safety at night. 5Adjustable dial fits 22.0\" - 24.0\" head circumference. 6Super light, weighs about 200 grams each.SpecificationThis helmet seeks a lightweight construction, ample ventilation, comfort personnel wearing and less resistance that make it one of the kind for Cycle, skating, skateboarding! Offering an in-mold PC shell and EPS liner integration for amazing impact conservation, with the fit adjustment wheel, Y-shape adjustable strap and breathable soft chin guard , the helmet securely stays on your head. Features:Impact-resistant polycarbonate shell with EPS foam absorbs shock. Detachable sun visor provides shade for your eyes. 18 vents keep your head cool and reduce wind friction. Super bright LED rear light for good visibility and safety at night. Adjustable dial fits 22.0" - 24.0" head circumference. Super light, weighs about 200 grams each. Specifications:Material: PC + EPS Type: With LED light / No LED (optional) Color: 1# / 3# / 5# / 7# / 9# / 11# (optional) Vents: 18 Head Circumference: 56 - 61cm / 22.0 - 24.0in Weight: 200g / 7.0oz Package List:1 * HelmetPackage List1 * Helmet