Whether commuting in the city or traveling outdoors, backpacks are essential equipment, especially outdoors. But if the backpack is not waterproof, bad luck and rainy days, it really becomes a capital letter embarrassment! The knapsack fabric is made of TPU and double polyurethane coated nylon, and waterproof material is also used in the zipper. Patented curved air cushion strap with four rows of nine air pockets connected each other, the package also has a large capacity main bag, small side bags, safety net bags, portable kettle bags, super capacity, fine functional subdivision, more perfect space utilization.