Alice Adult Men&iexcl;&macr;s Outdoor Bike Cycling Safety Carbon Helmet With Visor Yellow 100% Brand New and High Quality This bicycle helmet features 18 holes ,fits most adult body , adjustable head circumference . Suitable for outdoor climbing , cycling ,racing . Ultra-light material ,wind tunnel and duct design effectively reduce wind resistance. Construction:plastic outside shell with strap printing ,cool looking ; internal high quality foam layer , adjustable strap