The phrase "metal zipper" refers to a fastener used in clothing or bags, made of metal instead of plastic. It is used to open and close a piece of fabric by sliding a metal slider along metal teeth. Full definition
The front of this suit has a gold metal zipper with a long chain pull that opens to the middle of your waistline. (dresshead.com)
Cream background with tiny red and black alphabet letters, with a large metal zipper up the back. (thedressedaesthetic.com)
Elements like pleated long sleeves, durable metal zipper, practical pockets at sides and patchwork ensure it is a great style and daily option. (zaful.com)