We have a new puppy named Roxy. She's a mini Australian Shephard. Roxy had never had a collar, harness or leash. We bought the tipical webbing and retractable leashes. That's an aburpt stop for a newbie puppy. Hence, we made Bungee (Shock Cord) leashes.  The two short leashes are extensions for regular ridgid leashes. They are not nearly as nice as the longer Bungee leashes. but better than nothing. For the complete articles on the leashes go to https://paracordgalaxy.com/content/59-bungee-dog-leash and https://paracordgalaxy.com/content/61-about-the-bungeeshock-cord-dog-leashes.