This functional thermal underwear is made of high – quality micro fleece and can be used as a base or second layer. The soft, pleasant fabric leads moisture away from your body and keeps you warm, ensuring comfort and high performance. We recommend to wear it as a base layer during low physical activity and to wear it as a second layer over thin thermal underwear when the activity level and sweating is high. The specially designed material is very breathable, and ensures enhanced protection from cold temperatures, and flawlessly regulates the core temperature of your body.