Sat night temps got down to 24, the first sock Coffee made had no condensation in / on it.
Tonight it is supposed to get down to 13, my coldest yet with the sock, so we shall see.
Notes: The sock goes to about 1' "below" my feet to about 2' "above" my head. There is a gap under my UQ of about 2" to 3", & the top of the sock (suspended by the ridgeline) is about 1.5' to 2' from me. There is a Oval opening at the foot: about 8" x 2" & at the head its about 12" x 4". The head end opening is closed by a draw string like on a stuff sack.