bicycle helmet 1,in-mold technique 2,L size,sand blast 3,28 air vents, ... ,factory direct price Bicycle Helment Name 26 Air Vents In-Mold Bicycle HelmetModel TK-12P28Color black/red; white/black; blue/silver ... AdvantagesTUV,CE certification;28 air vents, good ventilateBuilt-in in-mold technique , the cover is very goodfasten elastic could adjust, sweat ...