The Women's Aspen Ski Base Layer Bottom is the first layer that checks all of the boxes. Sustainably made from super fine merino wool blended with bamboo fabric, this buttery soft, non-itchy base layer will keep you warm while naturally wicking moisture from your body to keep you comfortable. Featuring 4-way stretch to move with you and thumbholes to keep your sleeves in place during each stride, it's functional yet ultra comfortable.