A Martingale dog collar is a slip on collar that is designed to provide more control over your dog without causing harm or discomfort when walking and hiking. It consists of two loops - one that goes around your dog's neck and another that tightens when your dog pulls or tries to slip out of the collar. This tightening action prevents your dog from escaping while also preventing choking or injury. Martingale collars are often used for dogs with narrow heads, such as Greyhounds, Whippets, and other sighthounds, as they can easily slip out of traditional collars.

Martingales do not have a buckle - they slip over the dog's head