I own a Wiggys sleeping bag. It’s a -40 I’ve owned for many years. It’s very warm and has lots of room. That being said I would never use it for backpacking. It ways a lot. 8.5 pound or more I believe.
Several years ago, I invited our minister on a llama pack trip. He showed up with a below 0 bag that rolled up to about 20" thick by 40" long and weighed enough to cripple a Clydesdale. I decided it would be a good idea to loan him an extra 4lb down bag I had.
