I have a Vanson perforated leather jacket, but when it is smoking hot (AZ regularly gets above 105 degrees), it retains too much heat. Particularly when at lights or when running around town. I have a Vanson mesh jacket that has cordura & leather along the outside of the arms, shoulders and back. The front and sides are mesh. It offers less protection than perforated leather, but it is much cooler to wear when commuting.
I bought a Motoport Kevlar mesh over pants that is suppose to arrive today. I am excited to give it a try. It is supposedly as tough as Vanson leather (which is extra thick and makes standard leathers look cheap). From my understanding, it flows air like standard mesh. They are pricy (around $375 new without a liner, $525 with a liner), but if they work as they say they do, it will be money well spent. In fact, if it does work, I will be getting a matching jacket before next summer. I have a couple of Vanson jackets that work well in the fall, winter and early spring. So I am through the majority of the hot weather and am good to go for the fall & winter.