1.Lightweight and Warm: Womens thermal underwear is lightweight. Our womens long john set included long sleeve top and a pair of full length pants. These 2 piece set thermal underwear are made of 95% Polyester and 5% Spandex. It is super warm. It can easily slip your daytime clothes or pajamas over the thermal base layer. The waistband is elastic for comfort fit. 2.Premium Fabric: Thermal underwear for women is made of premium fabric. It is ultra soft and moisture wicking. The wick away moisture can keep you dry with no sticky. The polyester and spandex material is breathable and allow the odor to escape. It can prevent the spread of smells. 3.Stretchable: Thermal winter tops and bottoms are stretchable for unrestricted movement. It is flexible, breathable and comfortable fit. You can move freely when you are at gym, work, or at home. It is not riding up or pinching. 4.Base Layer: When you go out for running, biking, skiing in the cold weather, you can wear this thermal underwear set under your clothing to keep you warm. It is ideal base layer for heat retention or worn on their own. Also, no tags can reduces any irritation and give you more comfortable feelings. 5.Warm and comfort is necessary during the day. These women thermal underwear long johns set is soft against your skin. Elastic waistband and crew neck design. It is 4-way stretch. It is comfortable and stretchable. It is must have in wardrobe in cold weather.