More like a 30 degree bag to me
- Gender: Male
- Familiarity: I've put it through the wringer
To start off, I used this bag a lot for over a year and LOVED it before I brought it down to 15 degrees. Two nights in a row I froze miserably, one at 18 and one at 15 degrees. Wearing a hat, smartwool base layers, a down vest and every piece of clothing in my pack wrapped around me on an insulated BA inflatable pad. The main weaknesses is the bag has no draft tube (or a bad one) and no draft collar. The zipper especially was super drafty. A 15 degree draft is seriously dangerous! I returned it and upgraded to a MH Down bag. I'm not sure how or why they call this a 15 degree bag. You get what you pay for. Its a good solid beater bag for around 30 degrees or couches but kind of heavy and large if you're backpacking. Go with a down bag in that case. This is the lower end of the Marmot bags in general.