Before getting this martingale dog collar, my dog would on the rare occasion escape her collar and run loose at the park and near streets. I searched various websites for a martingale collar and chose to try out this collar. It is very high quality and is very easy to adjust. Now I use this collar for every walk or outing and don't have to worry about her escaping. I feel very secure now and will be ordering another one whenever this one wears out.