Combines benefits of traditional tennis ball and squeaker toys for extra stimulation Durable, high-quality materials for added toughness Fun, erratic bounce makes this the perfect interactive fetch toy Non-abrasive felt is gentle on dogs' teeth and gums as they chew so they can continue to play with ease Available in four sizes: X-Small, Small, Medium and Large, so you can find the perfect fit for your pet The KONG AirDog Squeakair Ball combines two classic dog toys — the tennis ball and the squeaker toy — to create the perfect fetch toy. This durable, high-quality Squeakair tennis ball will not wear down a dog’s teeth. It’s made with a special nonabrasive felt, compared to the abrasive material on normal tennis balls.