【Vacuum Compression Backpack】This travel backpack features a built-in vacuum compression function, allowing you to expel air from the interior via an air release valve Compatible with creating significantly more Compatible with storage space. You can choose to use the included manual vacuum pump Compatible with quick compression, or simply press down manually Compatible with expelling the air; this effectively minimizes wasted space between vacuum bags, maximizing your overall luggage capacity. 【Vacuum Function & Built-in Air Pump】The backpack is equipped with a built-in air pump, eliminating the need to purchase a separate device. This versatile pump supports both inflation and deflation functions, adapting to a wide range of usage scenarios. 【Space-Saving Compatible with Storage Design】Our vacuum travel backpack features a \"wet/dry separation\" design. In addition to its vacuum compression Compatible with capability, it includes multiple multifunctional compartments, side pockets, and a dedicated padded pocket Compatible with laptops, helping you keep your personal belongings neatly organized. The vacuum Compatible with storage compartment boasts excellent airtightness, effectively isolating Compatible with items with strong odors. Please note: The vacuum Compatible with sealed compartment uses a high-airtightness zipper and a very tight locking mechanism; consequently, you may need to apply slightly more force when opening it. 【Ryanair Carry-on Standards】This backpack meets Ryanair's maximum requirements Compatible with carry-on size, easily fitting into overhead bins or under the seat in the aircraft cabin. The backpack opens completely flat – 180 degrees – just like a suitcase, with an organized internal layout that facilitates quick and efficient packing. It also complies with the carry-on regulations Compatible with most other airlines, including easyJet and Wizz Air, ensuring a hassle-free flight experience. 【Designed Compatible with Travel】The backpack's back features a luggage strap that securely slides over the handle of your rolling suitcase, completely freeing your hands. A discreet zippered security pocket on the back panel offers a safe and hidden place to Compatible with store your passport and other valuables. Constructed with a waterproof, breathable honeycomb mesh back panel and comfortable padded shoulder straps, the backpack effectively alleviates back pressure, helping you stay cool and energized throughout your journey. Whether for business trips, university travel, or short weekend getaways, this backpack is the perfect companion Compatible with your travels.