Outdoor Research Radiant Hybrid Jacket - Lightweight Insulated Winter Coat for Men & Women - Hiking, Skiing & Cold Weather Activities

I have 2 of the Radiant LT tops, which are like this one, only with 1/4 zip vs. full zip. I have those in large and they fit loose enough for a base layer, but trim enough to wear alone and not swim in it, or wear as an under layer. Naturally I thought I'd be a large in these--same company, same type of top. In reality, this was huge on me. Perhaps because it is a "jacket", so that may have been my mistake. Even more, I have larger breasts than when I bought the LT tops b/c of breast reconstruction due to cancer. So if it fits too large in that instance, it's definitely constructed more roomy than the LT top. That might be a selling point for you. For me, I wanted something snugger fitting for running, hiking, etc. Lastly, I ordered partly for the color. On my monitor the Desert Sunrise is a lovely muted medium pink. In reality, it is more like a bright deep pink, approaching fuchsia. Not unappealing, just not what I expected (go to the Radiant LT top page for a more accurate view of what this color looks like in person). I'd have kept it if it had fit how I wanted, but that ended up being 2 strikes against it, hence removing 2 stars. I'm ordering another LT top--this time in medium to have one that's a snug fit. Consider that top if your needs are like mine. My only complaints with that top are the lack of zipper garage (=neck scratches if you don't place something between your neck and the zipper), whereas this top/jacket does have that, and that it runs a bit short in the torso and sleeves. For reference with sizing: I'm 5'4", medium/muscular build, 150 lb, 39-31-39 measurements. Good luck!