Giro Shiv Audio Snow Helmet Snow helmet designed in conjunction with several elite snow riders Tune-ups in-helmet audio system lets you listen to music without earbuds EPS liner absorbs more impact energy gram for gram than other liner materials Super-cool vents pull cool, fresh air in and push heat and stale air out Comes in small (52 to 55.5 cm), medium (55.5 to 59 cm), and large (59 to 62.5 cm) fits