VARIO XL Freestyle Retriever LeashesOur VARIO Freestyle Retriever Leashes are an adjustable leash with combined collar, ideal for quick on quick off for the dog and owner on the move. It's German engineered design offers infinite adjustability, accommodating all neck sizes, with it's variable stop ring and slider which prevents the collar from slipping off the dog. The stop ring also serves the purpose of protecting the dog's neck and trachea against harm when the leash is pulled