Stay toasty on your outdoor adventures with the Columbia Women's Omni-Heat Baselayer Bottoms. These spandex base layer bottoms feature Columbia's Omni-Heat thermal reflective technology, which reflects and retains body heat to keep you warm without adding bulk. The four-way stretch fabric allows for unrestricted movement, while the flatlock seams prevent chafing. The wide waistband provides a comfortable and secure fit, and the antimicrobial treatment helps to keep odor at bay. Whether you're skiing, snowboarding, or hiking, these baselayer bottoms will keep you cozy and comfortable all winter long.