I have to be honest when I first received the Ranger Jersey I was a little skeptical. The fit was a little tighter than I had expected. I ordered a medium. 5’10” and 165 lbs. I have now worn the piece on many rides. Temperature range from 40 to 60 degrees. It is now my go to piece. The stretch is incredible. I no longer worry about the fit. One thing I really like is the choice of zipper. It is easy to open and close while riding even with gloves to regulate body temperature. I am more than happy. Also purchased one for my wife and she loves it as well. Great Job!!