The difference between waterproof bag and ordinary bag(1)

1. Material difference（waterproof bag)
The biggest difference between waterproof backpacks and ordinary backpacks is in the selection of materials. Ordinary materials are wet when they encounter water, and some materials have the function of preventing water splashing, that is, a coating is added to the material, which can block the entry of some rain, but it is useless if it encounters heavy rain. Moreover, the coated material has a certain service life, which will not work for a long time. Most of the materials used in waterproof backpacks are airtight or airtight, with thicker coating and even film on the other side, which has better waterproof performance.

2. Differences in manufacturing process(waterproof bag)
The manufacturing process of waterproof backpacks is more complex than that of ordinary backpacks. Many completely waterproof backpacks need to open molds when making them. The common ones are some hard shell backpacks, which use the open mold process, while ordinary backpacks basically only need the traditional sewing process.