Gear up for the cold weather with the Columbia Women's Omni-Heat Base Layer Bottoms. These synthetic base layer bottoms are equipped with Columbia's Omni-Heat technology, which reflects and retains body heat to keep you warm and cozy. The leggings are made from a blend of polyester and elastane, providing a comfortable and stretchy fit. The moisture-wicking fabric keeps you dry and comfortable during intense activities. Whether you're hitting the slopes or going for a winter run, these base layer bottoms will keep you comfortable and warm throughout the holiday season.