The FitPAWS® Donut may be used as a balance training tool or for core strengthening for small dogs. It can also be used for weight-bearing therapy. The professional-grade heavy-duty PVC material is formulated for use with dogs, provides superior gripping, and resists damage caused by dog nails. The FitPAWS Donut provides a moderate balance challenge. Its broad base offers more stability than a round ball. It has textured bumps on one side and a smooth surface on the other side. It is dark blue, approximately 12" high and easily inflates/adjusts. Comes with a pump and demo DVD.