The Smartwool Women's Merino 250 Base Layer Crew is a top-rated base layer top for women on Amazon. Made from 100% merino wool, this top offers excellent warmth, breathability, and moisture-wicking properties. The merino wool fabric is soft, itch-free, and naturally regulates body temperature, making it perfect for cold weather activities. The crew neck design and long sleeves provide optimal coverage and protection. The top also features flatlock seams to prevent chafing and a slim fit for easy layering. Whether you're skiing, snowboarding, or simply enjoying the outdoors, the Smartwool Women's Merino 250 Base Layer Crew is a reliable choice.