Drummers' gloves.   Don't want to plug any, there's only maybe two brands anyway.  I've tried golf gloves, baseball gloves, whatever, but drummers' gloves really work the best, nice and thin and well fit, possibly better than regular driving gloves, which I've had a hard time finding.  

OK, so why?  Well, for me personally, my hands get very dry in the a/c, that combined with a very smooth leather steering wheel makes it difficult to get a grip.  Hmm, interesting choice of words.  And a plus also, you sure get a lot of respect when doing traffic directing at 4 way stops, etc., they always obey the gloved hand.  So it's a matter of safety and control.  Yeah, OK, it's cooooool, too.