Yeah, I know, it depends. I’m trying to figure out what the degree ratings actually mean. I sleep what I consider to be about average these days. My wife, being in chemo induced menopause, sleeps a little on the hot side. I’m considering a pair of 40 degree bags. We both prefer to sleep with very little clothes (even when backpacking) and I wonder if we will get cold when it drops below 50?
For reference, I used a synthetic REI branded mummy bag rate to 30 for 15 years (or more). I’ve certainly slept in it when the lows briefly reached 30, maybe lower. With minimal clothes I was never cold. However, I was a lot younger then and I’m a lot older now…
So, if I get a pair of 40 degree bags, zip them together, anyone think we will freeze if it gets down to, say 30 degrees, one isolated night? Will these be warm enough for a low of 45 without dressing warm prior to climbing in?

