The Smartwool Women's Merino 250 Base Layer Crew is a best-selling synthetic base layer top known for its exceptional warmth and comfort. Made from 100% merino wool, this crew neck top offers natural temperature regulation, moisture-wicking properties, and odor resistance. The interlock knit construction provides a soft and cozy feel against the skin, making it perfect for all-day wear. Whether you're skiing, hiking, or simply lounging at home, this base layer top will keep you cozy and stylish.