The main body is made of waterproof and environmentally friendly fabric, which not only reduces resource consumption through environmentally friendly materials, but also has excellent splash resistance. It can easily cope with daily coffee spills and sudden light rain The main compartment has ample space, with a 16 inch independent computer compartment on the back, equipped with buffering protection, which can safely store laptops. Multiple small pockets are built in, which can classify and store small items for easier access The top is equipped with an adjustable buckle and flip cover, which can flexibly adjust the opening and closing height according to the amount of items. The lock is firm, widened and thickened, and the breathable mesh is matched with a back cushion to reduce pressure and avoid stuffiness.syi