Description: Lightweight integrally-molded PVC bicycle helmet. Vent holes bring cool air in and flush warm air out, well-ventilated. Soft removable, washable, anti-bacterial pads for best wearing comfort. Rotary internal regulator adjusts the tightness of helmet. It can protect you from crash, shock, blown sand and rocks and also separate rain, increase speed. Specification: Material: PVC Head Circumference: Approx. 58~61cm / 22.83~24.02inch Head Width: max 16cm / 6.30inch Color: Yellow Package Includes: 1 Piece Bike Helmet