Martingale collar
A martingale collar is like a regular collar but has two loops. The first goes over the dog's head, and the second is attached to the leash. This way, when the dog pulls, you can correct it by applying pressure.
What it is?
Martingale collars are a tool used for dogs that are good at getting out of their collars. You will want to assure that the collar is fit correctly and not too loose on your dog.
How to use?
About ⅓ of the collar is a loop that tightens with tension. A D ring is attached to the loop, where you would attach the leash. When the dog pulls, or the handler pulls on the leash to apply a correction, the martingale tightens and applies pressure on the dog’s neck. The martingale works similarly to a choke chain; however, it is probably not a good option for a stronger dog or a dog used to harsh corrections.