Durability is a primary goal. Golf balls are extremely durable and the Zippy RBT shell made from 5% Glass-filled Polypropylene is just a rugged. Because the ball is permanently sonic welded into the shell Zing Partners were able to require that Zippy RBT devices survive a six foot drop without breaking. These are tough, durable, and also capable of being used in the most gentle fashion or with great pressure equally well.
Zippy Golf Ball Massager
Free rolling ball. Unique inner features retain the golf ball with very low rolling resistance. This feature permits the user to apply as much pressure as needed without impeding the roll. This innovation also permits Zippy Rolling Ball Therapy devices to roll freely on many fabrics. Zippy RBT devices do not require lubrication to function as designed.