While on the last leg of a snowshoe-snowboard-ski-summit in a day circuit the Icebreaker Women's BodyFit260 Altitude Zip is still keeping you warm and toasty in the stunning alpenglow. While closing things up to protect against a rising wind the incredibly breathable mid-weight layer goes to work getting the moisture out while continuing to supply premium insulation. The best part is it's odor-free even after your unique all-day escape. Not the wool of the past the fine fiber and itchless New Zealand merino wool offers excellent warmth at half the bulk. The perfect winter base layer for your all-day adventure there's no need to change when you finally put on the lounge breaks. With a three-way collar (zipped up rolled down open) for venting and warmth versatility thumb loops keep the sleeves in place to cover wrists a drop tail keeps out a sudden wind gust and underarm gussets and sleeve inserts keep you mobile and descent ready. With a slim close-to-body performance fit the BodyFit260 Altitude Zip lives up to being the warmest and most breathable performance base layer to the last turn.