Chuckit!® Strato Balls are perfect for strong chewers who love a game of fetch! Made of durable rubber, Strato Balls are launcher compatible and bright enough to provide high visibility for your dog. Designed so that they bounce higher than standard tennis balls, the Strato Ball will keep your dog engaged and satisfied. Short flight, good for small spaces. Promotes healthy exercise and provides mental stimulation for your pet. Easy to clean.