These bottoms are crafted from a blend of 92% Polyester and 8% Spandex, featuring anti-pilling and anti-static properties to ensure a smooth, comfortable wear. The stirrup loops help keep the bottoms securely in place when layering. A silent, easy-access power button on the waistband makes it simple to choose your desired warmth setting. With three heat settings—Low (12 hours), Medium (8 hours), and High (6 hours)—you can stay warm in any condition.