The Under Armour Women's ColdGear Leggings are a top-rated option for women seeking high-performance flannel base layer bottoms. These leggings are made with Under Armour's ColdGear technology, which helps to retain body heat and keep you warm in cold conditions. The moisture-wicking fabric keeps you dry and comfortable during intense workouts or outdoor activities. With a compression fit and a wide waistband, these leggings offer a secure and comfortable fit. They are available in various colors and sizes to suit different preferences.