1.High Quality MaterialThe zipper bag is made of polyester cloth, which is waterproof, durable, and not easy to scratch, and the back is made of breathable, skin-friendly mesh. The nylon stretchable elastic waistband and durable belt buckle lock securely and absorb the pull of dogs up to 150 lbs.2.Removable Zipper BagLarge capacity bag with water bottle pocket, easy to store your smartphone, earphones, keys, poop bag, dog treats, and water bottle. Adjustable waist size from 23.6" to 47.2", choose the most comfortable belt size.3.Dual Soft Padded HandlesDual control handles can help you easily control your dog in an emergency or through the park, control the direction and speed of the dog, the length of the bungee cord is from 47 inches to 67 inches, the dog has enough activity space.4.Night Safety and ReflectiveReflective light on the zipper pocket and bungee cord, you can see even in low light, keep it safe when running in the morning or evening, free your hands for training, walking, jogging, with your dog Hike together.5.Shock Absorbing Elastic CordAs the hands-free strap is pulled, the elastic bungee tension becomes higher. This is a "stop pulling" warning, so your dog will gradually be trained. A dog running leash will reduce stress and muscle strain on you and your dog.