When retrieving or picking up a Soft-Mouth Trainer your dog does not have to bite down hard like they would with conventional plastic dummies. Our dummies are made with softer, more pliable plastic materials which give them the soft, supple feel of a real bird's body. Our exclusive, non-slip, patent pending S Grip ? Technology design make these dummies the most advanced and easy to use training tool available. With the S Grip ? design, the dog's eye teeth lock firmly into the curves of the dummy's exclusive patterns. The advanced design prevents slipping when a dog is grabbing or gripping and lets him use less downward pressure. The D.T. Systems' Soft-Mouth Trainer teaches your dog, over time, to use a softer, gentler grip. The Soft-Mouth Trainer also has a specially designed adjustable pressure valve.