Thermal Base Layers

U.S. Issue Level 1 Silk Weight Thermal 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 base layer...

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...