SuperCollar is an innovative collar and leash hybrid. Developed by an emergency vet and an award-winning design engineering firm, SuperCollar will eliminate your need for a traditional leash. When you need to walk your dog, just release the safety lock on the collar and pull out the retractable 36-inch leash. SuperCollar is strong, durable, waterproof, and features enough strength to tow a car. Yep, the cables for the leash have over 100 pounds of break strength each! There's even 3M Scotchlite reflective accents to protect your pet while on your evening walks.