I don't know which bivvy I've got. It's got a a cammo pattern so it's a good chance it's an army one. I do have a tarp and will make a tarp tent if weather looks iffy, otherwise it will be a plow point shelter. I'm using a 3 season bag. I should be ok. My buddy has a tent if things don't go well so I'm pretty confident. ...may squeeze in my trusty plastic sheet aswell. I know that works. Nothing like a plan b and c!