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Extreme Cold Weather Sleeping System

The Extreme Cold Weather Sleep System (ECWSS) will provide environmental protection between +40°F and -45°F and is intended to be used with the foam sleeping mat.

The ECWSS is designed to be used with the insulating clothing layers of the Extended Cold Weather Clothing System as supplemental insulation.




  • Set: 8465-01-306-2681 [pdf] (TAMCN: V46252F)
    • ECW sleeping bag: 8465-01-305-6991
    • hood and socks: 8465-01-305-6359
    • bivy cover: 8465-01-305-4688
    • stuff bag: 8465-01-305-6360

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  • TM 10-8400-203-23. 1990 with changes 1-11. Chapter 20.
  • TM 10-8400-203-23&P. 2010. page 0002-23.
  • Phlillip W. Gibson, Laboratory Evaluation of Two New High-Performance Polyester Batting Insulation Materials. 1990. [pdf]