bicycles parts 1,in-mold technique 2,L size,dull polish 3,21 ... 240g 4,factory direct price Bicycles PartsName 21 Air Vents In-Mold Bicycle HelmetModel TK-12P21Color red,light blue,dark blue , ... and Advantages TUV,CE certification;21 air vents, good ventilateBuilt-in in-mold technique , the cover is very goodfasten elastic could adjust, ... for you choosing BIcycles Parts(21 air vents,in-mold technique)