ThunderLeash is a clever and simple no-pull solution for your dog. It converts quickly from a regular leash to a no-pull harness and has safety features to prevent over-tightening. For those times you just need a standard leash for a quick walk or for times when your dog is well behaved, simply connect the ThunderLeash to your dog's collar just like any other leash. But for times when pulling might be a problem, simply wrap ThunderLeash around your dog's torso and slide it into the harness slot. Now, whenever your dog pulls a mild pressure is applied to his torso and the pulling will quickly diminish.