The versatile leash for dogs. The flexible extension leash Cavo is a great companion for everyday life. The round braided webbing of the dog leash feels comfortable in the hand and is particularly durable and robust. The practical aspect of an extension leash: you can adjust it to three different lengths. Simply attach the second carabiner to one of the three woven metal rings. This allows you to switch from a short leash for urban areas to a long leash for parks or forests in seconds.