Durable Resin Plastic Teeth Zipper The zipper teeth are made of a durable plastic resin that is resistant to wear and tear, and the zipper pull is made of a strong metal material. Resin zippers are also easy to open and close, making them a great choice for any backpack. We also have Metal zipper and Zipper accessory on sale. Our professional technical team is willing to offering consulting for all zipper production. We are waiting for your contacts~ Product Application …