92% Polyester, 8% Spandex. KEEP YOU WARM: The soft inner layer fleece keeps you warm, keeping you warm and comfortable, which is very suitable for fall and winter. SQUAT PROOF STRETCHY FABRIC: To Ensure Maximum Comfort and Long Lasting Warmth in Winter, The Thermal Leggings for Women Are Designed With a High Tech 4-Way Stretchy Material. Whether Youre Stretching, Bending or Squatting, Our Thermal Yoga Pants Will Always Stay Put and Provide All the Support You Need. COMFORTABLE WEARING EXPERIENCE: Made of a highly elastic outer layer and a fleece warm inner layer, with high elasticity, there is no hindrance to the bending of the legs. WEAR SUGGESTIONS - Dark leggings are matched with dresses of various colors, skirts, shorts, and wide-leg pants. CARE TIPS: To make your leggings keep soft longer, please wrap the pants with a gauze bag while machine washing. Fleece Lined Leggings for Women, Winter Warm Soft Yoga Pants