The ThunderLeash is the simpler “no-pull” solution for your dog, highly recommended by positive-based trainers across the country! This patented design is easy to use, and converts from a standard leash to a “no-pull” solution in seconds. No complicated harnesses. No irritating head-collars. The “no-pull” configuration provides a safe, gentle pressure on the dog’s torso, providing consistent feedback to stop pulling on your walks.