I resisted getting the cycling jersey for a few years after I gave in to the cycling shorts. However now I will seldom ride without them for anything but a very leisurely ride.

Some are warmer than others even though their material seems lighter. But they all breath and continue to do so even when soaked with sweat. If you buy cheap jerseys like I do, then you might consider getting a fully zippered one. The seams on the cheap ones can pull apart fairly easy and a full zipper makes it easier to get out of a sweat soaked jersey without pulling on the seams too much. Also, look at the sizing charts carefully and any reviews as to how the sizes run. I bought some really cheap imports in a large size that would fit a 140 pound rider better.