Extra-durable, safe balls are perfect for classic, timeless games of fetch and for encouraging your dog to stay active. But don't let the design fool you—these aren't your standard tennis balls; they have no abrasive outer fibers, so they won't damage your dog's teeth or gums. There is no gas inside, yet they still deliver an exceptional bounce. Always supervise your dog during play and check the ball for signs of wear; if you notice any worn areas, it’s time to replace it with a new one.