This shirt has become a go-to shirt for windy or chilly days, both on the bike and for running. I'm going to have to get another one. It is lightweight, stops the wind, wicks away sweat via the mesh panels. The fit is a bit relaxed, which I like, and it works great under a vest or a jacket that are warm but don't stop the wind. One of my best purchases this winter, as it keeps me from dodging my workouts on the windy or chilly days.