The Xiaomi Business Backpack is crafted from durable polyester fiber, which has been treated with a splash-proof coating. This special treatment provides effective protection against light rain and prevents short-term water seepage, making it ideal for daily commutes and unexpected weather conditions. The interior lining is also made from polyester fabric, enhancing the backpack's durability and ensuring it can withstand regular use. The combination of these materials not only offers longevity but also maintains a sleek, professional appearance, making it a reliable choice for both work and travel.