USGI Modular Sleep System (MSS) 4-Piece Sleeping Bag Kit

Why are there different NSN Options? Over the years, different government contractors have produced these items under different NSN numbers. Rest assured these are all the exact same product, they just have different part numbers. You can select and purchase any option that shows in-stock.
The 4-Part Modular Sleep System (MSS) sleeping bags and other components are constructed to be used in conjunction with each other, or separately to complete an interoperable system known as the extreme cold weather sleeping bag. The MSS is designed to provide comfort in temperatures ranging from 50°F to -50°F when wearing various layers of extreme cold weather clothing.
The Waterproof Bivy Cover is produced utilizing waterproof, moisture-vapor-permeable material with all seams heat sealed. The Compression Stuff Sack is constructed with water resistant materials with adequate volume for both bags as well as the Bivy cover. This unique sack compresses the system to one cubic foot.
INCLUDES:

Camo Green Patrol Bag
Black Intermediate Bag
Woodland Camouflage Waterproof Bivy Cover
Black Stuff Sack

SPECIFICATIONS:

Weight: Approximately 9.8 lbs