A zipper is a fastening device commonly used in clothing, bags, and other items. It consists of two strips of fabric with interlocking metal or plastic teeth and a slider that moves up and down to open or close the zipper. Zippers provide a secure closure and are easy to use, making them a popular choice for various applications. Zippers come in different types and sizes, including coil zippers, metal zippers, and invisible zippers. They can be found on items like jackets, pants, and backpacks. The invention of the zipper dates back to the late 19th century, and it has since become an essential component in fashion and design.