With 24 breathing holes; Ergonomics sponge can suit for different heads, comfortable to wear; 10mm thickness can assure firmness of helmet while wearing on your head; With vibration protection, EN1077 standard; Earbud is detachable; With goggle tie band, avoiding slip or move while skiing; With adjust device, convenient and comfortable to wear; Buckle is made of imported Dupont material, anti-break; Super soft jerk pad, sweat-absorbing and anti-slip, increasing safety and comfort.