Expandable Men。Large Travel Laptop Backpack, Expandable Flight Approved Backpack, Carry on Backpack for Women, Waterproof 17inch Laptop Hiking Backpack with Shoe Compartment, Black Size: XX-Large Style: Pure (Black) Expandable Zippers Capacity Water-resistant Material Separated Shoe Compartment 【Expandable Travel Backpack】Size before expansion is 18.5x12.2x8.66 inch/47x31x22cm; size after expansion is 18.5x12.2x11.8 inch/47x31x30cm. Enlarge capacity by zipper to meet the large capacity needs of travel, perfect for 5-7 days daily travel. 【Carry on Backpack Flight Approved】The travel backpack meets the carry-on requirements of many airlines. The air backpack can be placed under plane seat or overhead that save your carry-on charges. Note: Please check with your airline for size restrictions before your trip. 【Multi-pocket Design & Wet Bag】Main clothes bag x 2, wet pocket x 1, Laptop compartment x 1, Anti-theft pocket x 1 and many other pockets for your multiple needs for your daily use. The wet bag is made of high-density water-resistant material that can help you to separate dry items and wet items, if you have wet clothes or a towel, you can put it in the wet bag. 【with USB Charging Port】The backpack with built-in charging port enable to charge your phone anytime and anywhere. with a cable for charging port to connect the powerbank(Not included) in the bag and your data cable to charge your device. 【Waterproof material & Breathable Shoulder Straps】This laptop backpack is made of waterproo