Here is my solution for increased cooling without running the A/C. When trying to hypermile it costs me 10 MPG to run the A/C.
Previous poster spoke of the spotted pattern on your back and legs when using a beaded seat cover. What this means is only the part of the beads that touch your clothes collect sweat. The other parts use evaporation to cool you and don't leave you wet. There are
many beaded seat covers available on Amazon.
I also use a
"Tornado" fan that concentrates a strong breeze on your chest and head. You can get one for about $25 at any Pilot Truck Stop or Amazon.
This is the only picture I could find showing my beaded seat cover and "tornado" fan. One negative with the fan is the noise when run on high speed.