Godsen Mens Long-Sleeved Underwear Sets Crew Neck Shirts and Pants 93% Cotton 7% Spandex 1x1Rid180g/m2 Machine wash seperately in cold water, Drip dry Do not iron or Bleach Rated for Extreme Cold Tempreatures Convenient Fly front Keeps you warm and dry Long sleeve crew neck Great to be Wear Alone at Home or Add an Extra Layer of Warmth Under Your Clothes