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After several days of heavy rain, sometimes it rained and sometimes stopped, someone asked: "When it rains, why do the water droplets on the surface of my jacket not fall off, but even absorb into it? Does it mean that my jacket is no longer waterproof?" ?” That’s because your DWR water-repellent layer has gradually been lost, resulting in reduced waterproofness. There are many waterproof products on the market, and waterproof jackets are no longer exclusive clothing for mountaineering, camping, and hiking. Living in the city, we are always faced with the possibility of rainfall. Today, I will show you the differences between different waterproof levels. Where!