When you are planning to be out in the coldest weather you need the most effective thermal underwear you can get on your body. These superweight thermal shirts by Indera Mills formally Coldmaster, bring you both extreme comfort and extreme protection from the coldest temperatures. Indera designers make the finest winter thermal clothing and this superweight thermal shirt is just one example. This thermal underwear is made from an extra heavy weight fabric blend of 50% cotton and 50% polyester which helps it trap the heat inside where you need it and keep the cold outside where it belongs. Indera Mills thermal is the world's premiere in performance thermal underwear. These superweight thermal shirts create insulating air pockets which helps hold heat in. That means you stay warmer and dryer on the inside even when it is wet and cold on the outside. If you plan to spend any time outdoors this winter and want to stay comfortable while you are then get your hands on these high quality superweight thermal shirts by the Indera Mills Company.