The KONG Classic is built from a solid, all-natural red rubber compound designed for dogs with an average chewing style. Its hollow center can be packed with kibble, small treats, or a bit of peanut butter, turning a simple toy into a longer-lasting mental and physical challenge. The asymmetrical shape gives it an erratic, unpredictable bounce that keeps games of fetch engaging for dogs of many temperaments. The rubber is non-splintering and non-abrasive, and the toy is made in the USA from globally sourced materials. It can be washed with warm soapy water or cleaned on the top rack of a dishwasher. No assembly is required; the toy is ready to stuff and use straight out of the package. It is offered across a range of sizes so owners can match a KONG Classic to their dog's size and chewing habits.