100% Lifetime PromisePurchase YGSNTG Travel backpack and we'll give you a lifetime commitment and friendly customer service support. If you have any questions about this Travel Laptop Backpack airplane backpack, please let us know at any time and we will answer you within 24 hours. This product is not suitable for use by 12 and under. Expandable travel laptop backpack brings great convenience for traveling, studying and working Large Capacity & ExpandableThis extra large travel backpack is 35L with 20x14.6x6.7inch before expansion and 45L with 20x14.6x8.7inch after expansion, you can choose to expand or original according to daily needs. Large Carry on backpack has 12 pockets and the laptop backpack has a padded compartment that can fit a 17.3inch laptop, up to 18.4inch. Travel backpack's multiple pockets are designed to hold books, wallets, clothes, bottles and more, keeping your belongings organized Design for TravelThe water-resistant travel backpack c