Place a Capilene 4 Zip-Neck at the core of your layering system for those sub-zero Montana mornings spent on cross-country skis. Designed to keep you dry and warm during stop-and-go activities in cold weather, it has a smooth jersey face that slips easily beneath layers, and an interior grid that traps precious warmth, wicks perspiration, and breathes. Stretchy and compressible, with a snug-fitting collar and a deep zipper backed by a zipper garage and draft flap to help block West Yellowstone's cold. Raglan sleeves won't chafe beneath pack straps.