It is estimated that many people have heard of or even used water-resistant laptop bags. When purchasing or customizing backpacks, a topic that often arises is the use of water-repellent materials for backpacks, etc. So, what exactly is a water-repellent backpack? What? Is the water-resistant backpack waterproof?

A water-repellent backpack refers to a backpack made of water-repellent material. Water-repellent material refers to the use of certain technical methods in the fabric production process to reduce the surface tension of the fabric to less than the cohesion of water. When water drops on the surface of the fabric, it will form water droplets to roll away (like lotus leaves) instead of directly immersed in the fabric, causing the contents of the bag to be wet. It is worth noting that the water-repellent backpack is not a real waterproof backpack. Although the backpack is made of water-repellent fabric and has a certain waterproof function, because the waterproof strength of the fabric is not so great, air and water vapor can still pass through. If it is too long or the rain is too heavy, the rainwater will still seep in. In addition, even if the backpack material is completely waterproof, if the production process is not up to standards, such as the zipper and other details, it is not completely waterproof. It will still seep through the zipper gap. Such a bag can only be called a water-repellent backpack instead of a waterproof backpack. Therefore, don't confuse the concepts of water-repellent and waterproof. At present, most of the backpacks on the market have a certain degree of water repellency, and there is no problem with light rain, but if it encounters heavy rain, you should find a place to shelter in time.