Triple 8's Snow Audio Ski and Snowboard Helmet is perfect for anyone who loves to ski or snowboard while listening to great music. Each helmet is shipped with a built-in audio system with speakers in the earflaps and includes a standard 1/8 inch (3.5 mm) connection cable to plug into a phone or MP3 player. The warm, plush Halo liner, and padded chin strap provide a comfortable fit and the ski helmet's 10 external vents with mesh covers provide breathability and comfort. Customize the fit with the adjustable Fit Dial system, and keep goggles secure with built-in goggle clip. Made with ABS shell and EPS liner, this snowboarding helmet is ASTM F2040 and CE EN 1077 snow sport safety standard certified and incorporates a back neck curtain for additional neck support. The Triple Eight Snow Audio Helmet is available in three sizes to fit kids, youth, and adults: X-Small/Small fits 20.5 – 21.5 in (52 – 55 cm), Small/Medium fits 21.5 – 23 in (55 – 58 cm), Large/X-Large fits 23 – 24 in (58 – 61 cm). To determine proper size, measure around head with a soft tape measure or string. Manufacturer’s 180-day limited warranty.