Many people use the seat covers for their golf carts in the winter to keep their "buns" warm.  These seat covers also work great in the hot weather!  No sticking to hot plastic seats when the humidity is over 90!  If you don't have a fitted seat cover a beach towel works just as well.  Just lift the front of the seat and tuck the towel under. This keeps the towel from sliding every time you get out. Beach towels also work great when it is raining.  Helps keep the seat drier.