4 piece modular sleep system. Includes : warm weather sleeping bag (green) maintains body 30 to 50 degree climate, cold weather sleeping bag (black) which maintains body temp. In -10 degrees, a bivy cover which is waterproof and made of a breathable, vapor permeable material, and a compression sack which all the sleeping bags go into and compress. These are mummy style bags measuring 87 inches long x 35 inches wide. All zippers and buttons work perfectly.The item “4 piece Military Modular Sleep System” is in sale since Wednesday, April 09, 2014. This item is in the category “Sporting Goods\Outdoor Sports\Camping & Hiking\Sleeping Gear\Sleeping Bags”. The seller is “zombiesurvivalsurplus” and is located in Cincinnati, Ohio. This item can be shipped to United States.