Introducing the Icebreaker Women's 260 ZoneKnit Long Sleeve Crewe, the perfect heavyweight merino wool base layer designed for optimum performance in cold conditions. This women's thermal underwear shirt features ZoneKnit technology, strategically engineered to regulate body temperature and maximize breathability during high-intensity activities. The blend of Jet Heather and Black colors adds a sleek look, while the Raglan sleeve construction and gusseted underarms ensure superior mobility and comfort. Experience enhanced warmth with thumb slits keeping sleeves in place. Icebreaker's innovative use of flatlock seams offers a friction-free experience, reducing chafing during prolonged wear. The drop tail hem provides additional coverage against chilly winds, making it ideal for winter sports or as part of your skiing thermal gear. Overwinter in style with this essential long sleeve women's base layer, tailored to maintain warmth without compromising on comfort. Whether you're searching for the best merino wool thermal underwear or a reliable long sleeve base layer for skiing, this Icebreaker piece fulfills all your needs. With ample ventilation panels integrated into the design, it ensures active temperature regulation even as it functions as warm thermal underwear. Elevate your outdoor experience with top-rated women's thermal clothing that effortlessly combines functionality with elegance.