Genuine US Military Issue. Modular Sleep System (MSS) 4 piece by Tennier Industries. Ma de for the U. Military with Superior Materials and Workmanship NOT A CHEAP INFERIOR IMITATION! Made in the USA. MODULAR SLEEP SYSTEM 4 PART. The 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 cubit foot. Camo Green Patrol Bag. Woodland Camouflage Waterproof Bivy Cover. The item “USGI MSS Modular Sleep System 4 Piece Woodland Camo” is in sale since Friday, May 21, 2021. This item is in the category “Collectibles\Militaria\Current Militaria (2001-Now)\Original Items\Personal, Field Gear\Bags & Packs”. The seller is “wcsg20″ and is located in Fontana, California. This item can be shipped worldwide.