All waterproof products are use a high frequency weld , but the waterproof rating is different, for example, a very small and simple welding of the waterproof phone bag, as use the special accessories and proceed the high frequency welded process method, waterproof rating can reach to IPX7-IXP8. If you want to have a simple outdoor hiking trip, just need to bring some simple camping supplies, will be suggest to use a waterproof roll backpack, that the waterproof rating is IPX6 .
We also can produce different capacity & PVC or TPU materials, and different waterproof rating for backpack to meet variety of consumers sell markets .