Cuddl Duds Women's ClimateRight Stretch Thermal Leggings are highly rated base layer bottoms that offer both warmth and comfort. These leggings are made from a blend of polyester and spandex, which provides a soft and stretchy fit. The fabric is designed to wick away moisture, keeping you dry and comfortable during physical activities. The leggings have a mid-weight thickness, making them suitable for both cold and mild weather. Whether you're going for a run or just lounging at home, these base layer bottoms will keep you warm and cozy.