First of all, we need to define a jacket, what kind of clothing is considered as a jacket, and what kind of clothing can only be considered a general jacket? This definition starts from the function of the jacket, and the role of the jacket is used to shield the wind and rain, so The fabric of the Andes must have a waterproof function. In addition, because the design of the Andes is worn daily, it is also very important to meet the requirements of waterproofing and breathability. It is not enough that the fabric is waterproof. When it rains, rainwater will seep into the seams of the fabric, so all joints must be sealed with glue. So we can define the charge jacket as: the fabric has waterproof and breathable functions, and the seams are glued clothing.