Pull On closure Machine Wash 【Micro Fleece Lined】 90% Polyester, 10% Spandex. 【Ultra Soft & Warm】 Thermal tech fleece fabric of the baselayer caresses the skin so naturally providing maximum comfort and softness. 【Stretchy & Durable】 Spandex added for extra stretch and shape retention; close-fitting style does better in retaining body heat to keep you warm. 【Versatile Performance】 Thermal underwear with ultra soft hand feel and heat-retention is a perfect option during various indoor activities, outdoor excursion and recreational activities. 【Top & Bottom SET】 2 Piece thermal set they are ultra soft, warm, comfortable and great to wear at home or add an extra layer of warmth under your clothes.