Windproof as far as I can tell and not overly warm, but I wouldn't run in it above 45 or so. Very nicely made and true to size but cut for a trim build. I'm 5'9" with a 34 waist and that's about as far as this jacket will go. It is after all a running jacket, and for that it's great.
"Decent jacket, not as great as I wanted for Marmot"
At temps in the mid-50s and below this jacket is comfy, but it is too much for warmer days. I have worn it in the rain, and I found it too be too hot for my liking. It did not appear to be designed to withstand much water as water will eventually penetrate it. I had hoped it would be good for summer rain, but it was the wrong choice. It's a nice jacket for running under the right conditions