The Giro Nine 9 helmet as everything you want in a helmet on the mountain, with a dynamic set of specially designed headphones that are built seamlessly into the earpads so you can dial in your favorite sounds anywhere on the mountain. With tune earpads you don't have to hassle of discomfort of earbuds or extra cords. MP3 user's don't have to sacifice high quailty sound just plug in and go. For those of you that are always on the go the nine 9 uses 12 vents and removable vent plugs with removable earflaps. Other Features: Material: In mold w/EPS liner Adjust: Chin and earpads Certification: ASTM F2040 Vents: 12 Large vents Audio: Phone and MP3 use Use: Sking, snowboarding