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Here's what other sites are saying:
Think of the K2 Phase Pro Audio Helmet as a lightweight tank with luxury car-like upgrades on the inside. This durable helmet meets industry standards and certifications to help protect your head during a sudden crash, cartwheel session, or bonk on the head from a chairlift safety bar. Active matrix venting technology enables you to regulate the airflow of the helmet vent system with the touch of your finger (think climate control with the flip of a switch). The K2dialed fit system features a three-point adjustable interface to maximize fit and customization with the twist of a dial for on-the-fly convenience. And you're going to dig its removable, washable full-wrap liner system that wicks moisture away and supplies breathable comfort when you're hauling down the hill. If you're worried about a gap between your goggles and helmet, don't be, as the Phase Pro's universal brim design works seamlessly with K2 goggles and most industry goggles. The Phase Pro's baseline audio system brings your tunes to your ears and connectivity to your phone when you shred or chill on the lift. Its integrated headphones and on-cord mini-mic connect to your cell phone or your MP3 player for easy connection while you tackle a gnarly line or spin yourself dizzy in the park.
Low-profile, lightweight and durable, the K2 Phase Pro snow helmet features adjustable venting and integrated audio functionality for great protection while you rock the mountain.