Stay comfortable and stylish with the Columbia Women's Midweight Stretch Long Sleeve Base Layer Top and Bottom Set. This base layer set is made from a blend of polyester and elastane, providing a stretchy and breathable fit. The long sleeve top and bottom are designed to keep you warm without sacrificing mobility. The Omni-Wick technology wicks away moisture, while the Omni-Heat thermal reflective lining retains body heat. Whether you're skiing, hiking, or simply running errands in the cold, this base layer set will keep you cozy and dry.