printing bag 2021 high school students' schoolbag usb computer travel backpack

multi function printing bag, charming and fashionable, oxford waterproof and wear-resistant fabric, clear texture, comfortable feel, elastic and breathable back cushion, mesh layer design, breathable back pair, built-in elastic sponge, sweat and breathable, external usb cable port, intimate design, travel charging more convenient and fast, customized fastener, thick, firm, not easy to break, multi-layer partition design of reasonable use of space, orderly storage, double shoulder stress at the crack reinforcement, bearing more gravity, firm and durable