Given the Covid19 situation running is now my "go to" aka only workout. Additionally its letting me keep my sanity. I've gone from a casual runner to more of a daily runner. The illumiNITE bright Yellow pullover has been on me pretty much every run as its not quite warm enough to wear just a shirt. I feel safer with this on as I know the cars and sidewalk walkers can see me coming and going. The pullover is warm but not stifling, and it breathes so you don't overheat. I highly recommend this pullover and will be purchasing more as gifts for my running friends.