The difference between waterproof bag and ordinary bag(2)

Accessory difference between ordinary bag and waterproof bag
Whether waterproof backpacks or ordinary backpacks, the manufacturer's opening method is zipper opening, which involves the selection of zipper accessories. The ordinary zipper selected by ordinary backpacks is not waterproof and breathable, while the zipper selected by waterproof backpacks is waterproof and will not penetrate in case of water, which can protect the contents more effectively. There are several opening methods for the bag mouth of waterproof backpack: generally, the opening is the roll mouth, that is, the bag mouth is folded after being aligned and fixed with a buckle or other parts, so as to achieve the sealing effect. The other is bayonet type sealed bag mouth, which is used for many small waterproof bags, and it is unrealistic for large waterproof bags. Another is the air tight zipper opening, which is a waterproof zipper with high waterproof level. This kind of zipper has high cost and is generally used for high-grade waterproof backpack opening, outdoor ice bag and waterproof waist bag.