I have a Rapha Flyweight Jersey that is good for Texas summers. I was looking to add one more jersey, but I don’t want to spend another $180 bucks for a jersey. I was thinking the Castelli climber’s jersey, but am worried about fit. I’ve read size one or two up when ordering Castelli. I typically wear medium in just about everything. Any kind of UV protection is a plus, although I do apply sunscreen before going out.