A wrestling singlet (or simply singlet) is a one-piece, tight-fitting, colored uniform, usually made of spandex, lycra, or nylon, used in amateur wrestling. The uniform is tight fitting so as not to get grasped accidentally by one's opponent, and allows the referee to see each wrestler's body clearly when awarding points or a pin.
"I have never seen a wrestling match or a prize fight, and I don't want to. When I find out a man is interested in these sports, I drop him."
... Hedy Lamarr