The Smartwool Women's Merino 250 Base Layer Top is a top-rated gradient base layer top for women on Amazon. It is made from 100% Merino wool, providing excellent warmth and comfort. The Merino wool is naturally moisture-wicking and odor-resistant, making it perfect for active women. The long sleeves and mock neck offer extra coverage and protection against the cold. Whether you're skiing, hiking, or simply enjoying the outdoors, this top will keep you warm and cozy.