Description:Lightweight integrally-molded bicycle helmet.Made of EPS, high density, durable and comfortable.18 vents bring cool air in and flush warm air out, well-ventilated.With removable, protective, sweat absorption lining pad, comfortable to wear and easy to wash.Adjustable strap as well as adjuster within to adjust the size of head circumference.Stay safe while cycling with the bike helmet.Its compact style combined with the Advanced In-Mold polycarbonate shellShock absorbing inner for added protectionIt has 18 vents to reduce air resistance, keep you cool , comfortable, breathableFully Adjustable Straps and High Quality BucklePerfect for riding downtown, up a technical climb, and everything in betweenOne Size fits most adults (55~65cm Head Circumference)Material: EPS+PCSize: 55-65cm HeadWind tunnel: 18Weight: about 220gColor: Red + Black, Blue + Black, White + Black Specifications:Lightweight integrally-molded bicycle helmetDurable and comfortable18 vents bring cool air in and flush warm air outComfortable to wear and easy to washAdjustable strapFits most adults (55-65cm Head Circumference) Package Included:1x Helmet