The Helly Hansen Women's Lifa Active Light Baselayer Pants are a top-rated choice for women's athletic base layer bottoms on Amazon. These pants are made with Helly Hansen's Lifa Active Light fabric, which provides excellent moisture-wicking properties to keep you dry and comfortable during intense workouts. The flatlock seams minimize chafing, while the elastic waistband ensures a secure fit. These pants have a slim fit and are perfect for layering under other clothing. Whether you're skiing, snowboarding, or running in cold weather, these base layer bottoms will keep you warm and dry.