Cost Saving: With size 16.9x11.8x7.87 inch, Sinaliy travel backpack meets the personal item size requirement for most airlines, so you can carry it with you without paying extra luggage fee Extra Bag: This personal item backpack comes with a waterproof bag with size of 8.66*2.36*5.7inch that you can store toiletries, cosmetics, towels etc and with easy access Multi-Pockets: Sinaliy carry on backpack features with padded electronic pocket fits up to 16" laptop and 12.9 ipad, a wet pocket and plenty of multifunctional pockets to organize all you daily use and travel essentials 2 Carrying Ways: With hiding shoulder straps pocket design, you can carry our travel bag like a briefcase, getting the shoulder strap avoid from dirty when passing security check Easier Packing: Features with 180 degree opening and enough depth of the interior space, this traveling backpack enables you to pack it almost like a suitcase. And the side buckles will be helpful to compress the b