A winter hike above treeline is a trip that can be rewarding—but only if you’re prepared for the fierce conditions. A highly effective layering system is vital to keep one comfortable and safe from frostbite. Your head, neck, and face are especially vulnerable to blowing wind, ice, and sub-zero temperatures. In this video, AMC’s Equipped blogger, Matt Heid shares the four essentials for protecting your head and face from the cold—and the proper way to use them. Watch more AMC videos on YouTube.