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The US Military ECWCS Light Weight Thermal Underwear is a pair of high performance silkweight pants that are part of the Generation III Extended Cold Weather Clothing System. When worn in the 7-layer system, these silk weight thermal long johns are the first layer that makes up the ECWCS system which is combat tested and battle proven.

The US Military ECWCS Light Weight Thermal Underwear is the Layer-1 component of the 7-Layer ECWCS that is utilized by the US military. Constructed from lightweight Polartec Power Dry material, these cold weather underwear will keep you warm and comfortable in cold weather. When utilized with a layered approach like the military 7-Layer system these thermal underwear make up the important foundation of your cold weather fighting clothing.

  • Authentic US Military ECWCS Layer 1 Thermal Underwear
  • Designated Drawers, Light Weight, Cold Weather (GEN III)
  • Made from Polartec Power Dry Fabric
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