There was zero condensation either inside the hammock, on the space blanket or the parts of the underpad that were not covered by the SB. I think I remember some very slight condensation one time before, on the SB but not in the hammock, after a few hours at 18*. Maybe 27* wasn't cold enough to cause a problem. I think the humidity was pretty low. Or maybe the wind sneaking into the undercover was enough to keep condensation vaporized.