When you need temperature regulation and comfort over thelong haul, the Icebreaker Women's BodyFit 200 Oasis 12 Zip Top is there foryou. Whether layered under your ski jacket or worn under your backpack on amulti day trek in the mountains, this versatile baselayer keeps youcomfortable. Merino wool is breathable, regulates temperature and controls odorthanks to its natural antimicrobial properties. So you can put this top throughmultiple days of sweaty pursuits and still be able to snuggle your tentcompanion. The zip collar provides extra warmth when zipped up or extra ventingwhen zipped down for an added level of temperature control. Offset shoulderseams allow room for backpack straps to sit flat on fabric to prevent seamrubbing and side seams are moved toward the back to prevent chafing. A drop tail hem provides extra rear coverage.