Thermal Base Layers

U.S. Issue Level 1 Silk Weight Thermal Underwear Bottom The U.S. Silk weight Thermal Bottom is a base layer that is designed to wick moisture while providing warmth. Designed as Part of the ECWCS (Extended Cold Weather System) for the military as a...

FROG XGO Grid Fleece Thermal Pant   The USMC Grid Fleece Thermal Pant know as F.R.O.G. (Flame Resistant Organizational Gear) is a standard issue mid layer thermal bottom that will keep your warm while being highly breathable with...