Amazon.com: Carry On Backpack, Extra Large 50L Travel 。??【Friendly Customer Service】We provides Lifetime worry-free after-sales service of this travel laptop 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 laptop 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 laptop 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.*The travel bag for men women is equipped with USB charging port, making it easy to charge your phone anywhere, anytime. *The carry on backpack comes with an anti-theft pocket design, which effectively helps you protect the contents of your backpack whether you are traveling or in a crowded urban environment.