Modular Sleep System

The Modular Sleep System (MSS) is a modular sleeping bag used by the United States armed forces. The MSS consists of a camouflaged, waterproof, breathable Gore-Tex bivy cover, a lightweight patrol sleeping bag, and an intermediate cold weather sleeping bag. Compression sacks are included to store and carry the system.
Overview
The MSS is available in colors compatible with the universal camouflage pattern. The patrol bag provides cold weather protection from 35 to 50 °F (1.67 °C to 10 °C). The intermediate bag provides cold weather protection from -5 to 35 °F (-20 to 1.56 °C). Together, the patrol bag and intermediate bags provide extreme cold weather protection in temperatures as low as -30 °F (-35 °C). The bivy cover can be used with each of three MSS configurations (patrol, intermediate, or combined) to be comparable with the environment in which the system is being used; the bivy cover provides environmental protection from wind and water. Sleeping bags are made of ripstop nylon fabrics and continuous filament polyester insulation; camouflage bivy cover is made with waterproof, breathable, coated or laminated nylon fabric called Gore-Tex; the compression sacks are made with water-resistant, durable nylon fabric. These sleeping bags are manufactured for the U.S. military by Tennier industries. Note the 4 part Woodland camo modular sleep system is the earlier version.
Reference
*This article incorporates work from https://peosoldier.army.mil/newpeo/Equipment/Temp.asp?id=CIE_SS, which is in the public domain as it is a work of the United States Military.
*This article incorporates work from , which is in the public domain as it is a work of the United States Military.

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