This martingale collar will suit for those dog owners who find prong collars to be inhumane. It is produced of strong authentic leather, but it also has a brass chain, buckle and O-rings. The collar looks stylish. The combination of strong leather and shiny brass adds an elegant look to the collar. There are two loops which are connected with the help of the O-rings. With the help of this collar, you will be able to correct your Great Dane's behavior in a more humane way. The collar will have the proper effect on your dog when adjusted correctly. This collar is also useful for dogs who adept at slipping out of his/her collar. How does this martingale collar work? When the collar tightens, the two rings should never meet. If they do meet, the collar becomes too loose and your Great Dane will be able to slip out. Due to the O-ring which help to tighten the collar, you will be able to keep your gentle giant secure. With the help of this collar, you can tighten it just enough to get your dog's attention. This method of behavior correction completely differs from choke collars. Relax the leash and the tension will be released. If you are not sure how to use this collar, consult experienced dog trainers to learn how to use it.