... Model: HXW01 Size:58-61cm Weight: 225g Material:PC+EPS, Air vents:24 plastic helmetProduct Specifications: modelstructuresizeweightmaterialventHXW01in moldM/XL 58-61cm225gPC+EPS24 ... -Friendly PC shell, with in-mold technology. 2: 24 vents, which are put on reasonable positions, so that the in ... & out air-flow and the inner air-flow are smooth and fast. The design on ...