... ,in-mold technique 2,L size,dull polish 3,26 air vents,good ventilation ,260g 4,factory direct price Bicycle Helment ... Name 16 Air Vents In-Mold Bicycle HelmetModel TK-12V18Color blue/white/red ... Hot sell, off the shelf Specifications and AdvantagesTUV,CE certification;16 air vents, good ventilateBuilt-in in-mold technique , the cover is ...