Halti stops pulling because if you guide a dog's head, the body will surely follow. The soft nylon collar fits comfortably around its face without restricting the mouth. If the dog tries to pull or lunge forward, Halti transfers the forward motion into turning the head sideways. This immediately discourages the activity without any undue stress to the animal.Perfect for leash control training and as a permanent training collar for large or active dogs. Washable nylon webbing with strong metal loops and durable plastic buckle.

• Size 0 is recommended for the following breeds: miniature dachshund, papillon, toy poodle, yorkie, and similarly sized dogs.
• Size 1 is recommended for the following breeds: border terrier, jack russell, cairn terrier, welsh corgi, standard dachshund, sheltie, westie, whippet, and similarly sized dogs.
• Size 2 is recommended for the following breeds: beagle, border collie, cockers, saluki, schnauzer, standard poodle, basenji, Welsh terrier, and similarly sized breeds.
• Size 3 is recommended for the following breeds: Afghan, airedale, boxer, briard, chow chow, dalmatian, doberman, greyhound, German shepherd, husky, Labrador, pointers, retrievers, setters, springers, Weimaraner, and similarly sized dogs.
• Size 4 is recommended for the following breeds: mastiff, clumber spaniel, giant schnauzer, Great Dane, Newfoundland, ridgeback, rottweiler, and similarly sized dogs.
• Size 5 is recommended for the following breeds: bloodhound, large danes, mastiffs, St. Bernard, and similarly sized dogs.