I have the current GI Issue ACU Modular Sleeping Bag System it has the five pieces. The ACU Bivy Cover, the Foliage Green Patrol Bag, the Urban Gray Intermediate Bag, and two stuff sack; one big stuff sack for all the Modular Sleeping System and a small bag to use two sleeping bags. Yes, their heavy and bulky worth every penny. The Patrol bag warmer and cool temperature. The intermediate bag is for cold temperature. I've used it last winter it 20 degrees their pretty warm i love this sleeping system. I think its one of the best sleeping system outer.
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