In-mold PC shell with cool gradient design bike helmet . 1. Lightweight outer shell, EPS foam inner shell . Absorbs shock from direct impact to the head 2. Adjustable side straps allow to fine tune fit and comfort 3. Detachable visor helps reduce glare, 4. Dial adjustable system for perfect fit and fast release buckle , 5. Sweat -absorbent heat seal inner pad 6. Well ventilation system with 26 air vents. High safety in mold bike helmet with cool design. 26 air vents. Adjustable dial fitting. Head size from 55 to 58cm. Foam padding. Quick-release buckle fastening. Suitable for 5 years and over. Manufacturer’s 1 year guarantee.