I have a seven-year old Rottweiler named Seika, who just happens to weigh 135 lbs. We’ve been using the Mountain Dog leash for a month or so now. Two results worth mentioning: 1) It’s true, they are very comfortable and seemingly durable; more so than my previous leash, and 2) People actually stop me to ask about the leash, as it’s so unique! I also have the feeling that should Seika see a rabbit or a squirrel, and decide that it’s go-time, that this leash will hold (even if that means dragging my 200 lb frame head first, behind her!). Thanks Mountain Dog! I look forward to using more of your products in the future.