The Mountain Warehouse Women's Keep The Heat Base Layer Bottoms are a warm and versatile bottom layer designed for chilly weather. Crafted from a blend of 41% Acrylic, 32% Polyester, 19% Viscose, and 8% Elastane, these bottoms boast several advanced fabric technologies. Firstly, the Heat Retention property ensures that you stay warm in cold conditions. Secondly, with High Warmth, they provide additional insulation to keep the cold at bay. The Isotherm technology maintains a consistent body temperature by trapping warmth. Moreover, these bottoms possess Moisture Wicking capabilities, which help in quickly evaporating sweat, keeping you dry and comfortable. Lastly, their Quick Dry feature ensures that they dry rapidly after coming into contact with water. These bottoms are pull-on style for easy wear and removal.