Bench cover that reduces sweat?

[Thedivingpirate]

I have a really nice cloth bench seat in my 77. I bought a beaded seat cover that is pretty marginal at best and really doesn't help with the amount of sweat. What do you guys use as seat covers to increase air flow?
I know most likely it is just how it goes with these trucks but was hoping someone might have figured out something that works.
Thanks for you time
Chris