John P.wrote a review of Castelli Gabba 2 Jersey - Men's on October 7, 2016
Familiarity: I've used it several times
The Gabba lives up to the hype. My first ride with it was 23 miles in the rain at 52 degrees F, and I was entirely comfortable. Subsequent rides have been just as good. It is wind and water proof, without making you feel like you're in a plastic bag. It fits snugly all over, but I think it's generally true to size. I'm 5'8" 150lb, and I wear large Castelli shorts, but the M jersey fits exactly, with just enough room for a thin base layer. If you are on the line, probably order up a size.