Heat gear will keep you cool. If you get a perforated suit and ride in cooler temperatures you may want to get some cold gear too. Just remember that any good suit won't fit comfortably if you are standing up. They are designed with curves to fit properly in the riding position on the motorcycle. My suit rides up like hell in the crotch if I try to stand straight up. Lol
If I prefer Dainese racing suit, because is very comfy.