These are Government Issued for the Military. Colder Temperatures can be managed by using multiple components, hence the MSS. Putting the Patrol and the Intermediate sleeping bags together provides insulation to at least minus 30 degrees Fahrenheit for a soldier dressed in polypropylene expedition weight undershirt, drawers and cushion socks. Protection to minus 50 degrees Fahrenheit is possible for a user wearing various layers of ECW clothing inside both bags. This Modular Sleep System is in very good condition with no holes, tears, or rips. Please check out My E-bay Store for more great Deals. Be sure to add me to your favorites list. The item “Military Surplus, Army, Camping, Modular Sleep System” is in sale since Saturday, July 21, 2012. This item is in the category “Sporting Goods\Outdoor Sports\Camping & Hiking\Outdoor Sleeping Gear\Sleeping Bags”. The seller is “topgaines” and is located in Carrollton, Georgia. This item can be shipped worldwide.