Just bought a retractable leash today, it has the nylon webbing throughout the entire leash, unlike some with webbing and then a thin rope as the rest of the leash. Anyways my 9 week old pup managed to chew through it within a few minutes. My wife and I were eating lunch at the park and I wasn't paying attention to her for a few minutes and when I looked at the leash it was half severed the webbing was thin and looked cheap but I paid around $22 bucks for it and this was the first use lol. I just cut off the first couple of feet and re-tied it to the clip. I really need to find a way to stop her from chewing on her leash lol.