I've been using this to run in during colder weather, and just as a jacket in milder weather. It's kept me comfortable during weather below 0 degrees Celsius. I also hike to the crag with this on during cooler early morning. I also really like the design of the slightly offset zipper. It helps this piece standout from other jackets. the fleece isn't anything special but it does the job. It is a trim fit, so keep that in mind for sizing. I did have one thread beside the zipper come loose. I cut it out and there does not seem to be any other threads.