Specifications: The main material of helmet body is EPS foam, so the helmet features stronger buffer and shock absorption, which make riding more safe. Hard shell is made of PC material, sturdy and durable. Adopting aerodynamics and ventilation design, the helmet compared with the normal helmet, featuring super large streamline front air intake holes, improve air flow. 26 Large air guide holes help dissipate heat and ventilate, strengthen air flow, reduce resistance, and ensure that riding is not stuffy. The increase head circumference fits for the large head circumference, and make them have comfortable wearing experience. Item Name: Cycle Helmet Material: PC Shell, EPS Foam Holes: 26 Gender: Men Features: Durable, Adjustable, Head Protection, Large Circumference Size: 27cm x 21.5cm x 15cm/10.63" x 8.46" x 5.91" (Approx.) Head Circumference: 56cm-63cm/22.05"-24.8" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Helmet