... ,adult bicycle helmet 2,children bicycle helment 3,26 air vents 4,factory direct price ,frosted helmet Bicycle Helmet1. Comprehensive IntroductionName ... Hot sell, off the shelfSpecifications and AdvantagesTUV,CE certification;26 air vents, good ventilateBuilt-in in-mold technique , the cover ... -----ensure your cycling confortable Magic Velcro—sweat absorption 26 air vents In-mold Bicycle Helmet