Kong Signature Sport Balls are built with extra-thick rubber walls covered in a non-abrasive felt exterior, giving dogs a bouncy toy meant to hold up through repeated rounds of fetch. The felt covering is designed to be gentler on a dog's teeth and gums than typical tennis ball material. Each ball is made without an internal squeaker, so play stays quiet at home or out at the park. The balls are intended for supervised fetch and retrieve play rather than sustained chewing, and packaging should be fully removed before use. Play should stop if a ball becomes torn or otherwise damaged, since no toy can withstand every dog indefinitely. The line is offered in multiple sizes and pack counts so owners can match a ball to their dog's size.