Tugging is one of a dog's most instinctive activities. In the wild, it's an important part of how packmates feed cooperatively, and in domesticated environments, it's a great energy expender for the active, playful canine. But it's important to carefully control when, how, and where a dog plays tug with a human. One of the most crucial factors is to have a toy dedicated to the game, so dogs won't think it's OK to start tugging on your socks or the leash. With this innovative, dual-material toy, Kong brings their legendary quality and durability to the game of tug. Flexible and super-strong grips are made from Kong's proprietary rubber formulation, while the rings feature durable nylon construction.