Godsen Men's Cotton Thermal Underwear Pajamas Sleep Set 100% cotton//95% cotton and 5% spandex//93% cotton and 7% spandex Water temperature does not exceed 30 , not chlorine bleaching, ironing highest temperature 110 , not dry, not wring, hang dry Long Sleeve Thermal Tops and Long Pants Ultra Soft, Warm and Comfortable 2 Pieces Thermal Set (Top & Bottom) Convenient Fly front Great to be Wear Alone at Home or Add an Extra Layer of Warmth Under Your Clothes Rated for Extreme Cold Tempreatures