Currently in my possession I have a Katabatic Sawatch and a MLD Spirit 38 quilt. Today I decided to try and put the synthetic MLD bag inside the down Sawatch. It was quite comfortable, and I'm sure i could take it down close to 0 wearing my winter sleeping clothes. But my question is this: Will there be a string likelihood of condensation building up on my down bag on the outside? I have read some threads on summer down bags inside synthetic 3 season bags, but would it work the other way around?
