Ethical Pet's Barrett Ball is made of solid natural rubber. One solid unit of rubber with no seams makes this dog toy virtually indestructible. This ultra durable toy was invented by USA war veteran James Hayes, who needed a tough chew toy for his service dog named Barrett, an 85-pound German Shepherd who tore apart even toys labeled "indestructible." James partnered with Ethical Products in Bloomfield, NJ, to create a toy that was safe for Barrett. They were the first company willing and able to help produce James's re-designed ball, and to also do something quite profound with their profits by making regular donations to K9s for Warriors.