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...

USMC XGO FROG Silk Base Layer Thermal Shirt The Military Issued USMC FROG (Flame Resistant Organizational Gear) is a Cold Weather Base Layer Thermal shirt that is part of the military cold weather clothing system (ECWCS).  Manufactured by XGO...