Manstore cycling fashion&comfortable sports helmets CH08 Material:EPS foam The kind of helmet is adjustable and suitable for both mountain bike and road bike ,with the brim detachable The dynamic smooth line design cuts the drag of wind and increase core power of your body The well-made protective lining coverage area is large,which can improve the comfortable sensation of head ,buffer and protect head from getting hit,also there is nets inside the lining to prevent flies fly in The ability to resize is advantageous for wearing,improving comfort and increasing safety.