The GoughNuts Maxx Black Ring was made for the most aggressive chewers out there! Built with an easy to use safety indicator the ring encourages safe play. The safety indicator has colors that let you know when it's safe to play. Black/Green encourages play and Red discourages play. The layers put distance between your hand and your dog's mouth so when the layer turns red we recommend that use stop using the Maxx Black Ring. Before purchasing please make sure that your dog is a power chewer as the ring may be too large for most dogs. Please note that it does not float.