Quick little break down for those wondering how the US modular sleep system works. The camouflage bivy bag is the waterproof layer that you have the option of using either sleeping bag in or both for really sub zero temperatures. Its been a hot minute since we have had these fellas in so if these have been on the watchlist, get amongst it today! https://www.armyandoutdoors.co.nz/collections/new #usarmy #acu #ucp #sleepingbag #bivy #bivybag #wintercamping #camouflage #usgi #militarysurplus #milit