Review on Duofold Weight Varitherm Thermal Medium by Gustavo Mathew

I have a low body temperature and wear thermal underwear for most of the winter. There appear to be two categories of thermal underwear: full polyester, which resembles cotton, and a polyester/spandex blend. The all-polyester models cling to the pants, making them a little harder to move, and they roll up, giving them a worn-in look. Polyester - that's what they are - slides better under jeans or whatever pants you're wearing, so they're much more comfortable. In addition, they retain a sleek, new look. In terms of heat retention, both formulations seem the same to me. They also dry much faster, if that matters. So I fully support this option.