Teknic makes a great jacket that is not only warm when you need it but the liner becomes a mesh jacket. I also have a Tourmaster mesh jacket, very good but not as versatile.
I want to take exception to a comment made in an earlier post. Trying something on at a dealer's showroom and ordering it on the net is bush. I order all the time from the net but I also support my local dealer when I can. We all want to keep these guys in business so they will be there when we need them