1.Material: The surface layer of the fabric is 32% recycled cellulose, 32% cotton, 20% polyfiber, 16% spandex, the inner layer of the fabric is 90% polyfiber, 10% silk, no ball, no fading, no deformation, no static electricity and no formaldehyde 2.Heat Retention: Womens thermal underwear keeps your body heat from escaping. They provide extra warmth and coziness to make a perfect everyday baselayer. 3.Ultra Soft: Our thermals for women are lined with fleece for extra softness against your skin. They’ll protect you from the cold for added comfort. 4.Moisture Wicking: While at home or at work, our womens long johns will keep you dry and odor free. No matter the activity, you’ll stay confident all day. 5.4 Way Stretch: The soft and stretchable fabric on these womens long underwear fit snugly against your skin and will keep you moving freely no matter what your activity is.