KONG Core Strength is build to last and is sure to bring excitement while providing extended play sessions along the way. The durable KONG-crafted multi-layered core stands-up to long-lasting chew sessions while meeting a dog's natural chewing instincts. The reinforced layers within the core add extra toughness making it great for power chewers. The exterior textured words add to the fun and have the added benefit of cleaning teeth and gums. Ideal for independent play and interactive toss and retrieve, KONG Core Strength is sure to delight the most playful of dogs