Friendly Customer ServiceWe 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 PressureNormal 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 CapacityThis 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