I wanted to put this gem I just found actually into the Accessory List thread, but its too good to let it go down there. Apparently there is a Jacket that connects to your Jeep Wrangler A/C vents to keep your warm in winter and cool in summer. So you could go topless in your Wrangler with no worries.
Bloody hell, what'll they think of next...? Must be a Jeep thing hey? Normal people would just put the bloody top up! Ha ha