The Under Armour Women's HeatGear Armour Leggings are a top-rated choice for women's athletic base layer bottoms on Amazon. These leggings are made with Under Armour's HeatGear fabric, which is lightweight, breathable, and wicks away sweat to keep you cool and dry. The compression fit provides support and helps to reduce muscle fatigue. The flatlock seams minimize chafing, while the wide waistband ensures a secure and comfortable fit. These leggings are versatile and can be worn for a variety of activities, from running to yoga. With their high-quality construction and performance, they are a popular choice among athletes and fitness enthusiasts.