Underperforming sleeping-bag? Here is a fascinating read about the evolution of sleeping-bags and thermal testing;
www.mammut.ch/mammut/uploadedFiles/Sleep Well_Pt1_E.pdf
excuse me if it's already been posted somewhere.
all the best
Al.
www.mammut.ch/mammut/uploadedFiles/Sleep Well_Pt1_E.pdf
excuse me if it's already been posted somewhere.
all the best
Al.