Joined: Mar 2014
Posts: 18,355
Likes: 6,676
From: ,location, location
Bikes: Foundry Chilkoot Ti W/Ultegra Di2, Salsa Timberjack Ti, Cinelli Mash Work RandoCross Fun Time Machine, 1x9 XT Parts Hybrid, Co-Motion Cascadia, Specialized Langster, Phil Wood Apple VeloXS Frame (w/DA 7400), R+M Supercharger2 Rohloff, Habanero Ti 26
Two important things for the larger discussion on sleeping bags in a more general sense:
1. Have a good sleeping mat. Most of your heat is lost through the ground and any sleeping bag no matter what temp it is rated at is almost worthless without a mat.
2. A liner can help extend the range of your sleeping bag. Sea To Summit makes a very nice range of both Coolmax sheets and Thermolite liners. I would also recommend a liner just to help keep your bag cleaner and less funky.
As far as bags, the Mountain Hardwear Ultralamina series is my top choice. I have a UL45 and I love it. It is fairly light weight and compacts down plenty for my needs and doesn't have the many many many issues of down.