Perhaps the finest dog toy ever invented! Great for use as a release reward during training. Your dog will be fascinated with the erratic bouncing action of the "Kong"; it changes direction with each bounce. Dogs will entertain themselves for hours with the "Kong". Made from a special, puncture-resistant blend of natural rubber for long-lasting service. Great workout for teeth and gums. The black Pro Kong and King Kong Ultra are for "power" chewers. Cool Kong includes throw rope, and floats.