WaggWalker Dog Walking Communication Harness PLEASE read the Sizing Guidelines shown here in the pictures on the left and contact us before returning or posting a review! We want you to love our product. The WaggWalker Dog Walking Communication Harness is a kind and gentle way to train your dog to walk by your side. If your dog begins to pull forward, simply use a "flick and release" of your leash to create a zipping sound. This sound is used to communicate with your dog so that he learns to focus on you and know exactly where you want him to walk as you guide him to your side. FREE bonus safety clip is attached to your dog's conventional collar providing you with a total safety package when walking with your dog. Please follow our Sizing Chart and Suggested Guidelines for Use shown in the picture to the left. Take the lead and get tails wagging with the WaggWalker!