Hey guys, I've been hiking lately at the Alps in temps ranging from 30 to 60 degrees and used a bottom-up Columbia shirt for my hiking, but felt it wasn't warm enough. I'm looking for a solid, lightweight, breathable base layer, suitable for mentioned conditions with a released loose fit around arm pits. I saw many next-to-skin base layers are too snug in armpits area. hate that. Also, I'm 5.9' & 160 lb with chest around 39~ inches, so if you can recommend a size to your model I'd appreciate that. Thanks!
