This jacket does what it claims. I haven't had the opportunity to test it in temps below 40 degrees yet but I am pleased with its performance so far (riding very comfortably in the 40's and 50's). I was surprised at the protection such a relatively lightweight jacket could provide. I live and ride in a coastal community and it's always windy. I'd been eyeballing the Rapha soft shell but that's way out of my league. I'm very pleased with this purchase. The short sleeve feature is a nice touch as are the 3 back pockets (although one zip pocket would have been nice). The fit is good. I am lucky, however, that I tried the jacket on in local store. If I hadn't I would have ordered the next size up given the information provided on the sizing chart (I'm 5'9" and 175 lbs. with a 42" chest and was pleased with an extra large that is somewhat fitted). The only minor complaint is that the pull on the zipper is a bit small. Also, I wish I had waited a bit longer to make the purchase as I just missed out on the Mistral Gloves free gift.