Made of Good quality Non-slip textured PU grip and durable nylon cord, On human-oriented design - curve and rough surface designed to fit your finger and prevent from skidding. Extend your zipper fixer: ATTACHES VERY EASILY onto most zippers; Can be applied as a replacement for zipper or to attach to zipper for adding length. Perfect for all your packs, duffel bags and jackets, you can also hang them on mobile phones, key rings, purses, etc. to differentiate your items.