I am 5'6" 165Lbs 43" chest and 34" waist. The Medium fits me very well and allows for layers underneath. It is slightly roomy but does not look baggy on me. There is a waist adjustment and the hood adjustments are excellent. I bought the Summit for cold weather so I plan on wearing a fleece or puffy layer under this jacket, both work very well, and the combination of layers feel comfortable with no restriction of movement. I also have a size Small in this jacket and it fits me too but t is more form fitting, just a little room for an under layer and does feel slightly restrictive of movement. Either size for me works depending on the season and my layering system. The Graphite color is very well represented in the photograph, it is a nice dark tactical grey as shown. For all day or heavy rain protection, I pair this up with the Marmot Precip Slate Grey rain jacket in size Large, which is a very close color match. All 3 layers combined mean I can regulate and adjust on the go in all conditions while hiking and moving and being hot, or stationary while camping and getting cold. I have worn an older model Summit in the rain for several hours and it did begin to feel like it started to wet out on my shoulders. I think that's just the nature of a soft shell. When it matters most on multi day trips in the wilderness, the Marmot Precip is always at home in my pack for use as a hard shell rain layer, and it's ultralight and durable. I like the new larger YKK zippers from the older generations, and the Graphite grey looks very professional with coyote brown load outs, packs, and pants.