Martingale collars are also known as Greyhound Collars or Humane Choke Collars. The Martingale Dog Collar was designed for Sighthounds (ie, Greyhounds, Whippets, Italian Greyhounds, Borzoi, Saluki, etc) because their necks are larger than their head and they can slip out of traditional side release dog collars; these collars have gained popularity as training dog collars with other breeds in the recent past because trainers prefer the humane choke aspects.

Martingale Collars have 2 loops. The smaller of the loops is called the "Control Loop". This is the portion of the collar that is attached to the leash and tightens when it is pulled. The second loop is the adjustment loop. This is the part of the dog collar that you adjust to the right size to fit your dog.