Conquer the coldest environments with the Men's Under Armour Base 4.0 Base Layer Bottom, engineered specifically for bone-chilling temperatures and low-activity pursuits. This high-performance base layer utilizes a unique grid-patterned fleece lining that traps warm air against your skin while effortlessly wicking away moisture to keep you dry and comfortable. Built with 4-way stretch construction and an ergonomic flatlock seam design, it delivers maximum mobility and chafing-free comfort during all-day wear. Complete with advanced scent-control technology to keep you feeling fresh, these leggings are the ultimate thermal defense you need for your next extreme winter adventure.