"No. 5 resin" refers to the material and specification of the zipper, which is usually divided into No. 1, No. 3, No. 5, No. 8 and other specifications; "open end" means that the zipper is an open type, which can The design is directly detached from the tail; "spring leather head" means that the stop of the zipper adopts a spring-type design, and the leather head part is made of leather material; "sky blue cloth belt and leather head" means the zipper belt The opening part is made of sky blue fabric and leather; "High-quality cloth strap is not easy to break" means that the strap of the zipper is made of high-quality fabric and durable; Environmentally friendly leather head materials are used and meet relevant testing standards. Overall, this is a high-quality, waterproof and environmentally friendly zipper product that can be widely used in outdoor sports, travel and diving.Resin zippers are very common on outdoor jackets and shoe bags, mainly because they have the following advantages: 1. Strong wear resistance: The teeth and sliders of the resin zipper are made of special materials, so it has better wear resistance than ordinary metal zippers, and is suitable for use in harsh outdoor environments. 2. Anti-rust and anti-corrosion: Resin zippers can resist the erosion of water, humidity and chemicals, and are not easy to rust and corrode. 3. Good flexibility: The resin zipper is soft, not easy to deform, and it is still flexible at low temperature, and it is not easy to pull it. 4. Lightweight: Compared with zippers made of other materials, resin zippers are lighter in weight and will not increase the weight of shoes, bags or clothes. To sum up, resin zippers are a good choice for outdoor jackets and shoe bags because of their flexibility and convenience.