2nd night testing the summer sleeping bag as an UQ.
Had no trouble staying warm. It wasn't as cold last night only 29F.
As Ron an BillyBob pointed out, I should check for condensation because the SS is waterproof. I did check between the SS and the UQ and
there was condensation. No puddles mind you but enough I could feel it on the SS material and in the summer sleeping bag.
So Ron and BB you were right. Thank you for pointing this out. I might not have caught this issue until it was too late.
IMO, This could be a real problem on a multi day outing in cold weather.
IF a vapor barrier was installed above my UQ. Wouldn't that just move the condensation problem up the bottom of my sleeping bag?
For right now, this mod is a bust for me. Using the HH SS to hold a summer sleeping bag in place of a UQ was not successful.
To make this work properly the 2nd layer needs to be breathable.