This two-pack of long-lasting rubber balls will keep your pup entertained: they bounce high, fly far, and make a whistle sound while in flight. It's lightweight for easy throwing, and its grooved surface helps remove plaque, tartar, and debris from your pup's gums and teeth. Its bright color is easily visible, and it's perfect for fetch games and satisfying active canine instincts. Its variety of uses, both indoors and outdoors, is accompanied by easy clean up. Not to mention, these toys help to mentally and physically stimulate your pup for overall health. Plus, it's compatible with the Chuck It Ball Launcher for an extra-long workout. Not recommended for the toughest of pups.