Carhartt Women's Base Force Heavyweight Bottom is designed to keep you warm and comfortable in the harshest conditions. These flannel base layer bottoms are made from a blend of polyester and spandex, which provides excellent insulation and moisture-wicking properties. The pants feature a smooth flatlock seam construction that minimizes chafing and a comfortable elastic waistband for a secure fit. Whether you're working outdoors or enjoying winter sports, these thermal bottoms are built to last.