【AVOIDING BAGGAGE CHARGES ON FLIGHT】: ECOHUB Airplane travel backpack have the perfectly sized to avoid baggage fees. The underseat carry on bag measures 18x13.7x7.8 inch and has a capacity of 30L, with a weight of 1.6lb. Suitable for all major airlines like spirit, frontier, easyjet.（PATENT PENDING） | 【LARGE CAPACITY】: The carry on Backpack opened up like a suitcase which makes it way easier to pack. The spacious main compartment with two thoughtfully-designed pockets that help your contents more organized and elastic straps are perfect for bulky items like shoes and clothes. Side compression straps adjust the travel bag space so you can pack more. | 【MULTIPLE COMPARTMENTS & POCKETS】: Large front organizational pockets can hold important items such as ipad and notebooks, pens, passports. The key chain can secure and locate your keys stress-free. A top access pocket so you can grab your travel documents and glasses quickly. The hidden back pocket can hold valuable items such as phone, wallet and so on. Quick access zipper pocket on front panel for toiletry bag security check. | 【READY TO TRAVEL】: Built with a USB charging port, the smart backpack will keep your phone fully powered when you travel. Perfect for both short trips and long journeys, the thick and soft shoulder straps with foam padding. The expandable water bottle pocket is very convenient for travelers and hikers. The side handle allows us to easily carry it as a holdall. Looping the luggage strap for easy to move with your suitcase. | 【SUSTAINABLE & GUARANTEE】: Our carry on bag is made from at least 50% recycled materials, with fabric and lining crafted from 34 recycled PET plastic bottles. The water-resistant, lightweight fabric, combined with heavy-duty SBS zippers and reinforced ripstop stitching, ensure durability for any adventure. If you have any concerns, reach out through your order. (Patent Pending)