■ Weight,Sizes & Colors S: 240g, M: 255g, L: 270g Size: S(48-52cm), M(54-58cm), L(58-62cm) 5 ranging colors ■ Construction Outer Shell Construction:In-mold polycarbonate shell with EPS liner Inner Shell:Thermoformed reinforcement shock absorbing polystyrene ■ Fit System Lightweight fit system with an easy-to-turn dial for adjustments ■ Ventilation 21 Wind Tunnel vents with internal channeling ■ Comfort Removable and washable inner padding in Coolmax material- COOLMAX internal pads(cushioning comfort pad) are used in larger surface in contact with the head for increased comfort. Detachable for hand wash and anti-allergenic. Comfort Liner and Chin Pading keeps a good fit ■ Compatibility No ■ Certification CE EN 1078 ■ Accessories NO