The KONG Signature Ball 4-Pack offers a variety of fetch experiences for pups. Each of the four balls has a unique texture, providing high-flying action to keep dogs engaged and active. Constructed with super-sturdy, ultra-bouncy materials, these long-lasting balls satisfy dogs' natural chasing and retrieving instincts, promoting healthy exercise. Some balls squeak while others are silent, allowing pet owners to control the volume of playtime. The special felt coating on the KONG Signature Sport Ball is gentler on teeth and gums compared to regular tennis balls, making for safer, more comfortable play.