George Cole wrote a question about MontBell Ultralight Down Jacket - Men's on December 13, 2012
I'm curious. I don't layer with down when packing or climbing regardless of temperature (although I don't do much below zero) because sweat vapor eventually saturates the down and causes it to lose it's insulation value. Instead I use fleece and/or a MontBell UL Thermowrap suit (Exceloft fill). For those of you who report using this jacket as a layer, do you use it for extended, moderate to strenuous activities?