I bought two of the Simple Dog Collars 6 months ago to replace some cheap Chinese dog collars that kept coming undone when my dogs would pull on the leash during walks. The wife and I got tired of having to fix the issue. Guess that is what we get for buying cheap Chinese goods. Found Saddle Back Leather on Youtube and gave the company a chance with several products including this one. We are very happy. Not only does the collar stay on but it also does not rub off all the hair on my dogs where the collar comes in contact with their necks. The previous ones did. Would highly recommend this company's products!