Godsen Men's Mid-Weight Wicking Long Johns Bottom Pants 95% Cotton / 5% Spandex jersey 180g/m2 Water temperature does not exceed 30 , not chlorine bleaching, ironing highest temperature 110 , not dry, not wring, hang dry Rated for Extreme Cold Tempreatures Convenient Fly front Ultra Soft, Warm and Comfortable Pull On closure Great to be Wear Alone at Home or Add an Extra Layer of Warmth Under Your Clothes