bicycle helmet 1,in-mold technique 2,L size,sand blast 3,28 air vents,good ventilation , ... factory direct price Bicycle Helment Name 26 Air Vents In-Mold Bicycle HelmetModel TK-12P28Color black/ ... black; blue/silver; yellow/black; red/silverAir vents 28size L(58-62cm)Sale Status Hot sell, ... shelf Specifications and AdvantagesTUV,CE certification;28 air vents, good ventilateBuilt-in in-mold technique , the ...