Waterproof multi-function card bag is usually made of waterproof material, such as waterproof nylon, TPU, etc., can effectively prevent water droplets, sweat and other liquids from infiltrating, and protect the items in the card bag from moisture damage.In addition to holding cards, the waterproof multi-function card bag also has multiple pockets and compartments, which can be used to store small items such as cash, change, keys, headphones, and even some small electronic devices.Waterproof multi-function card bag compact size, light weight, can be easily put into a pocket, bag or backpack, does not take up space, easy to carry.The material and style of the waterproof multi-function card bag are very diverse, there are simple solid colors, and there are fashionable patterns, which can meet the aesthetic needs of different people.The card bag is equipped with zipper, button and other closing methods, which can effectively prevent the loss of items.