AFTER SALES SERVICE GUARANTEE: We solemnly promise that within one year of purchasing and receiving this product, if any quality defects occur during normal use (not due to improper use or human damage), you only need to take a photo of the defective product and contact us. We will reply with a solution to the problem within 24 hours, or send you a new identical product for free to replace the defective product(Note: Products purchased and used for more than one year do not enjoy this right) | STURFY AND LIGHTWEIGHT, SUITABLE FOR TRAVEL: The travel backpack is made of lightweight and sturdy polyester material, with a zipper that is easy to close and open. This portable backpack meets the personal carry on standards of airlines and can be installed under the overhead luggage rack or seat. You can easily install travel equipment for 2-4 days, equivalent to the capacity of an 18 inch suitcase, making it a good choice for weekend vacations and business trips | CONVENIENT DESIGN: This portable travel backpack is designed with thick padded shoulder straps and a hidden anti-theft pocket on the back for storing valuable items such as wallets. There is a pocket on the left side for placing water bottles, and two handles on the top and right sides, designed to lift the backpack from multiple angles, providing you with a more flexible carrying experience | EASY TO ORGANIZE: The main compartment of the luggage backpack can be opened 180 degrees for easy access to items. It has independent mesh pockets and spacious space to store different travel equipment. The internal compression elastic band can effectively secure items. The front compartment is equipped with various pockets for storing stationery, books, pens, and other small items, while the rear compartment has a separate computer compartment for easy access | REDUCE PRESSURE FEATURE: The luggage backpack is equipped with an adjustable shoulder strap length device, 4 external side compression buckles, and a breathable back panel, which can effectively relieve pressure on the shoulders and neck, as well as reduce the pressure on the zipper. Thickened sponge handle and shoulder straps make carrying and gripping the bag more comfortable(This item is not intended for use by people 12 years old and under)