The KONG® CoreStrength™ Ball is durable and guarantees exciting, long-lasting playtime. The durable, multi-layered core provides ample chewing fun while catering to dogs' natural chewing instincts. The reinforced layers inside provide additional robustness. This makes this toy ideal for dogs who like to use their teeth actively. The word-textured surface adds extra fun and can help clean teeth and massage gums at the same time. The CoreStrength™ Ball is ideal for independent play as well as interactive fetch games and is sure to delight any dog, no matter how hard they chew. Note: Please never leave the pet unattended while playing. No toy is indestructible. To prevent injuries, the toy should be checked regularly for damage or loose parts and replaced if necessary.