Love this bag - Big Agnes Blackburn UL 0 Sleeping Bag 850 DownTek

This bag is perfect for cold weather camping for those of use who feel constricted by a traditional mummy shaped bag. This bag is spacious enough for comfort, but not too big where you’re loosing thermal efficiency and adding unnecessary weight. The material is also very soft and comfy. The implementation of the big Agnes sleep system allows the down to be strategically placed to ensure maximum warmth. That being said, it is important that you use an appropriate rated sleeping pad. I used the Blackburn with the BA q core slx and I was comfy at 18°F just wearing a base layer, sweatpants, hoodie, and a hat. Any colder than that and I think I would switch to a pad with a high r value or use a closed foam cell pad in addition. I really can’t say enough good things about this bag. I also have the Anvil horn 15 and a buddy has the mystic 15 and those are also great bags. Just depends on your budget and needs.