Upgraded version of classic black-anti-theft and water-repellent backpack

. The outer side enlarges the water bottle bag to upgrade the capacity and can put an enlarged water bottle . The anti-theft pocket is designed to safely store passports and mobile phones, so you will never be afraid of theft (Stick back independent anti-theft pocket design, anti-theft rate 100%) . Decompression harness made of thick and soft cushion to reduce the burden on shoulders . There are a total of four water bottle bags inside and outside, and the bottles and cans are easy to store. . The laptop compartment is thickened to protect the laptop, and can hold a 14-inch laptop (The actual test can hold a laptop up to 35 cm in length) . Rainwater protective cover TEFLON® waterproof coating +600D fabric (A backpack with a waterproof coating can withstand small and medium-sized rains) - . There are a total of 12 mezzanine layers inside and outside, so you won't be in a hurry to organize your backpack . Exclusive keychain design, you will never find a key again . Can be used as travel bags, fashionable laptop bags, school bags for class . Hand-held and back dual-use design . Size: 30cm(width) x 15cm(depth) x 40cm(height) . Material: CORDURA fabric . Net weight: about 0.5KG . Cleaning method: After washing with water, place it in a ventilated place and hang to dry Do not throw into the washing machine / Do not dry / Do not spin