😍【Friendly Customer Service】We provides Lifetime worry-free after-sales service of this travel backpack. If you have any problem about our carry on backpack, please do not hesitate to contact us, we will do our best to resolve it. (THIS ITEM IS NOT INTENDED FOR USE BY PEOPLE 12 AND UNDER.) | 😍【Reduce Pressure】Normal Size: 19.6 * 12.9 * 5.9 inch; Expanded Size: 19.6 * 12.9 * 9 inch.The travel backpack for men women equipped with adjustable chest straps, air-mesh ventilated back panel, can effectively relieve the pressure on the shoulder and neck.The backpack travel has a thickened sponge handles and shoulder straps provide you with more comfort when you are carrying and gripping the travel laptop backpack. | 😍【Expandable & Large Capacity】This large travel backpack is designed to be expandable, backpack for travel giving you a large capacity pack up to 50L, unzipping to get larger storage space. The carry on backpack for men women fits overhead and under seat while on state of standard carry on size, ideal for business or weekend travel, and easily carried on most flights. | 😍【Airline Approved & Practial】: The large travel backpack airline approved can be freely unfolded 90-180 degrees, allowing you to quickly pass through airport security and keep things tidy. The luggage strap on back allows the mens carry on backpack for travel to securely slip over the handle of any rolling luggage for hands-free transport, easier carrying. A perfect travel gifts for men women. | 😍【USB Charging Port & Headphone Hole】Carry on backpack built-in USB Charging Port and headphone outside hole design. This travel backpack is convenient to charge your phone(Note: POWER BANK is not included). Headphone jack provide a hole to enjoy the music while walking.