I haven't slept the night and yet but went outside and tested it. It is so warm! I was in pajamas and crawled inside and got too hot once the bivy was on. It's winter where I'm at right now, and according to Google it was 35°. This is not the same as the genuine military one that I used to have. I was very sad when I lost it and my dad who gave it to me recommended I buy this one. I could not be happier! I can't wait to take it on adventures. Yes it is heavy, but that weight is worth it for me. Knowing that I have multiple sleep options for any environment, that I will stay dry and warm and comfortable is worth hauling it around. We also did a water test with some bottled water pouring over it while I was inside and I noticed no leaks. I also love the fact that there is a cinch cord for the bivy that you can reach inside of it to make sure that nothing will get in. The only thing that I dislike about it, which is more of a nitpick than anything, is how long it takes to roll back up. It's actually a good thing that it takes so long for the air to get out, it means that it's well sealed and it's probably not going anywhere anytime soon. But it could be a pain in the butt if you had to pack up camp quick. But I'm sure my dad knows a trick or two to make the process quicker. Also, I'm 6 ft and there's room enough for me and probably my dog in there. There's definitely enough room to slip a sleeping pad in between the bivy and the sleeping bag so that it doesn't roll out from under you in the middle of the night. One thing I would recommend, buy a reusable dehumidifier pack.
Military Modular Sleeping Bags
SKU: Modular Sleeping Bags
Army Military Modular Sleeping Bags System, Multi Layered with Bivy Cover for All Season
Sale price:$ 249.99