Large Carry On Backpack, 40L Expandable USB Backpack, 17.3” Laptop Backpack for Men Airline Approved Travel Business Weekender Bag

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【EXPANDABLE LARGR CAPACITY】Compressed capacity of 27L, full-expansion up to 40L. Dimensions: 18.1*12.6*7-10.6inch (46*32*18-27 cm); Weight: 3.24LB(1.46kg). Fit 17.3 inch laptop and below. 40L large business travel backpack suit for 3-7days overnight daily travel. 【FLIGHT APPROVED TSA FRIENDLY】Fully open flap making you quickly through the airport security. A luggage strap on the back allows the travel backpack to be fitted on luggage/suitcase, used as extra capacity for carry on luggage. The travel backpack airline approved is able to be placed under the seat. 【4-LAYER COMPREHENSIVE PROTECT】4-layer compartments covered with cotton design provides large storage space, improves comfort and relieve back pressure. Plentiful pearl cotton protects the valuables in the men's computer suitcase backpack from being crashed. 【USB CHARGING BACKPACK】External USB Charging port and internal charging cable in the carry on backpack for men offers you a more convenient way to charge your phone while walking. It is convenient to charge your phone from outside due to there is a USB charging port. Totally accommodating for your travel needs. 【DURABLE & PRACTICAL DETAILS】Updated water bottle pocket on the side can hold larger water bottles than most carry on backpack. Pockets for wet items are designed to be completely waterproof. The two handles set on top and one side, which allow an easy switch between backpack and suitcase. 【WATER RESISTANT & ANTI-THEFT】High density Oxford covered adopted with the sturdy stitching process makes Fenruien laptop backpack water-resistant and scratch resistant. The back zipper pocket protects your precious articles from being stolen, such as phone, passport, wallet.