A dog collar is a piece of material put around the neck of a dog. A collar may be used for restraint, identification, fashion, or protection. Identification tags and medical information are often placed on dog collars. Collars are often used in conjunction with a leash for restraining a dog.
Collars are made from a variety of materials, most commonly leather or nylon. Less common materials may include polyester, metal, or vinyl woven from cotton. Collars can be decorated in different ways from a wide variety of materials.