Features 1、Partitional EVA hot pressing sponge. Effectively protect your head from all kinds of sports collisions, great fitment with different head curves. 2、Equipped with adjustable elastic buckle. Freely adjustable, more convenient to wear. 3、Rear adjustable strap design. It can be adjusted according to the size of the head. 4、There are punching holes on both sides of the auricle position, which is convenient for sound wave conduction and heat dissipation. 5、The belt material is upgraded to nylon+polyurethane material, which is durable and comfortable. Specification Item Type: Helmet Condition: 100% brand new Material: EVA Color: Red, Black, Blue (optional) Size: S, M, L, XL (optional) Size Head Circumference Unit in cm People Reference S 19.5 50 Children M 21.5 55 Teenager L 23.5 60 Adult woman XL 25.5 65 Adult man Package List 1 x Sports Helmet