Specifications 1. Helmet with adjustable internal regulator dial 2. 11 vents let air go through the skateboarding helmet 3. High hardness ABS shell, thickened soft sponge, comfortable and durable. 4. The breathable pads provides effective shock absorption and sweat absorption, makes you cool and comfortable while wearing. 5. The chin straps are easy to adjust, the buckle and velcro can be fastened and released quickly.