The KONG Squeakair Ball combines two classic dog toys - the tennis ball and the squeaker toy - to create the perfect fetch toy. Our durable, high-quality Squeakair tennis ball will not wear down your dog's teeth. It's made with a special non-abrasive felt, compared to the abrasive material on normal tennis balls. Covered by KONG Satisfaction Guarantee. See KONG Satisfaction Guarantee document below for full details.