The Under Armour Women's ColdGear Authentic Base Leggings are one of the most popular base layer bottoms on Amazon for women. These leggings are designed to keep you warm and comfortable during cold weather activities. They are made with a dual-layer fabric that has a brushed interior for added warmth and a smooth exterior for easy layering. The leggings also feature a moisture-wicking technology that helps to keep you dry and comfortable during intense workouts. With a fitted design, these leggings provide a snug and supportive fit without feeling restrictive. They are available in a variety of colors and sizes to suit different preferences and body types.