The KONG Tires is a durable tire chew designed to provide the ultimate chewing experience. The uniquely shaped sidewalls and thick outer tread create a super durable, elastic barrier. The sidewalls are designed to double up and rebound when compressed to provide an active chewing experience. The Tires are perfect for bouncy games of fetch. This tyre-shaped toy is made of durable KONG Extreme Rubber for determined chewers. Fill the inside wall with Snacksandtrade; or Easy Treatandtrade; to extend playtime. Made in the USA with Globally Sourced Materials. Available in two sizes: S and M/L. Materials: 100% Rubber (Natural). Warning: Supervised use only. Remove all packaging. Discontinue use if damaged.