Gerry Thermal Undershirt Men's Gray Medium. This is a high quality thermal base layer to keep you warm when its freezing. Color: Gray Size: Medium Length: 23.5" Sleeve: 20.5" Chest: 20" No Smoking or Pets, Fast Shipping Offers are welcome, Bundle 3 items from our closet and SAVE 15% !!! No Rips, Stains, or Tears.