Zippers for your choice of assorted zipper or select your own color to match your project. They work fantastic for purses, diaper bags, backpacks and wetbags! A coil zipper is made of spiral plastic elements, such as polyester or nylon. This is the most popular zipper among the three types of zippers. This versatile zipper can be used in anything from apparel garments to luggage or sporting goods to automobiles. Expand your possibilities with our coil zipper. YKK closed bottom (non-separating) nylon coil zippers.