1.Air Travel Backpack: The size of this vacuum travel backpack is 423117 cm/16.512.26.6 inch, which not only meets most airlines' maximum hand baggage size requirements and helps you save on check-in baggage fees, but also comes with a vacuum compression system that allows you to carry more clothes than ever before. (Note that the vacuum backpack does not include a pump, please refer to the actual object when you receive it) 2.Compression Space: This vacuum travel backpack doesn't come with a pump, but you can squeeze the air with both hands to achieve the compression effect. Firstly, put the clothes into the pocket, organize and zipper up the zipper; then open the air holes and squeeze the air inside with both hands; finally, quickly close the lid of the air holes. The vacuum compression can greatly reduce the size of clothing, the backpack can hold more items, convenient for travelers to carry more essentials. 3.Ease The Burden: The vacuum pockets isolate your items from the outside world, effectively preventing dust, moisture, etc. from entering and keeping your items clean and hygienic, which is especially suitable for long-distance travel and use in complex environments. As items are compressed, the overall volume and weight of the backpack can be reduced for the same backpack capacity, thus reducing the burden on the traveler's back and making traveling easier. 4.Multifunctionality: This personal item travel bag is fully functional, not only can be used for pumping and compressing, but also has a shoe compartment, usb charging port, and wet/dry pocket. The shoe compartment can store all kinds of shoes, the bottom with air holes can be ventilated without odor. usb charging port can be connected to your cell phone, keep your phone powered on. Wet pockets can store toiletries etc. 5. Material: The backpack is made of high quality, waterproof and wear-resistant fabric, which not only effectively repels water splashes and tears, but also protects the items inside the bag. Reasonable layout of multiple compartments allows you to easily organize all kinds of items. The back design fits the curve of your back, so you won't get tired even if you carry it for a long time. Adjustable thickened shoulder straps further enhance the comfort of carrying.