For year round use. Made in the usa. 4 piece (all will in contained inside the green patrol bag when you receive it). Green patrol sleeping bag – rated for temps to 30 degrees. Black intermediate sleeping bag – rated for temps to -10 degrees (rated -30 degrees when used inside green bag). Woodland camo goretex bivy cover – waterproof and windproof rated -40 degrees when used with green and black bags. Compression stuff sack – to transporting your bag. Use each piece separately or combine them based on the weather conditions. All items are brand new never used. Packaging was sealed but i opened for purposes of making sure all pieces were there and to take pictures (please don’t hold it against me if you see a stray dog hair, i have two large yellow labs, it was not easy to get it back in the package). We are a smoke free home.The item “NEW 4-Piece Modular Sleep System MSS Military Sleeping Bag ECWS USGI” is in sale since Sunday, April 26, 2015. This item is in the category “Sporting Goods\Outdoor Sports\Camping & Hiking\Sleeping Gear\Sleeping Bags”. The seller is “treasurehuntersjv” and is located in Santee, California. This item can be shipped to United States.