It's mid January, and you're off to Banff Ski Resort or Duluth MN for some fun. Whether you're skiing the Canadian Rockies or running along Lake Superior, you'll be thrilled you're wearing the Arc'teryx Women's Phase SV Zip Neck Top. Made with Arc'teryx's heaviest weight baselayer fabrics, the Phase SV top offers core warmth plus ventilation thanks to a combination of fabrics and the neck zipper. The body consists of dense and stretchy Phasic SV fabric that also provides warmth, wicks, and dries rapidly. The Phasic AR fabric at the underarms is lighter and helps remove perspiration so you don't literally chill out after getting worked up. Both fabrics have built in sun protection, and silver ions encapsulated into the fabric to reduce the rate at which odors accumulate in the shirt. On its own or under several layers, the Phase SV top gives you wicking warmth with stretch for cold weather, all day play.