herobiker women's thermal underwear set, ultra soft thermal shirt long johns top bottom with fleece lined - winter base layer sets m black herobiker our thermal underwear will be the best choice for thermal retention in winter 2 piece set: 1 long sleeve top + 1 full length bottom feature: -double layer long knit cuffs. -90% ultra-soft polyester, 10% spandex -elastic waistband -fleece lined moisture wicking -full cut comfortable fit -ultra soft warmth -shrinkage controlled for lasting size and shape -thermal knit retains body heat to keep you warm and comfy. description: (1)winters can get rough and cold. these thermal underwear will help you make it through. they are silky on the outside but lined with soft thermal fleece on the inside. (2)they can also be worn under your casual or formal attire such as under your jacket, sweater or hoodie without adding any bulk or visible crease lines in your clothes. (3)the waist of the pants is elastic for a comfortable snug fit. both top and bottom are stretchy, perfect for active wear. these light-weight thermal pants make all the difference in the world.