
I am 5ft 8" and 175 lbs, 40" bust, 35" waist. The medium size fits me very well (not tight). Can't say the same about Mountain Tech II, it's a size down. The middle one runs small. I have 5 of these shirts, great shirt, dries quickly. This shirt is very stylish, I have used it on the Inca Trail, Camino de Santiago, Via Francigena and other trails in temperatures around 45-50Β°F. It wicks sweat away from the skin and into the fabric where it is distributed and evaporates quickly so you stay dry. , feels comfortable and packs easily into a backpack It's polyester, it doesn't wrinkle or shrink at all You can create your spring and fall layer for outdoor activities with this shirt.