Collars are made with a variety of materials, most commonly leather or nylon webbing.
A dog collar is a piece of material put around the neck of a dog.
Identification tags and medical information are often placed on dog collars.Collars are often used in conjunction with a leash for restraining a dog.
Use of a harness instead of a collar may be beneficial for dogs prone to tracheitis or those with a collapsed trachea.