What is a "zipper"?

A zipper is a fastening device used in clothing, bags, and other items. It consists of two parallel rows of teeth that interlock when the slider is moved up or down. The teeth can be made of metal, plastic, or nylon, and the slider can be made of metal or plastic. Zippers can be used to close or open an opening in a garment or item, and they come in a variety of lengths, styles, and colors. They are a common feature in many types of clothing, including jackets, pants, skirts, and dresses, and are often preferred over other types of closures for their convenience and versatility.