bicycle helmet 1,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 ... Hot sell, off the shelf Specifications and AdvantagesTUV,CE certification;16 air vents, good ventilateBuilt-in in-mold technique , the cover ...