Vario 6 can be used as a single leash that converts easily from a 159cm long leash to a 100cm traffic leash. It can also be used as a double leash and even works as a hands free leash. Finally, it can be used as a short or a long tether if you want to tie your dogs down for a short time. It is made with super soft nylon with double webbing thickness for extra strength. Comes with reflective stitching for night time safety and heavy duty plastic D-rings and snap clips that are built to last.