Amazon.com: HOMIEE Travel Backpack 40L TSA Friendly Flight 。?[Large Capacity & Three-Layer Structure] - The carry on backpack for airplanes can hold 3-5 days of travel gear for a business trip. This travel backpack features three storage compartments so you don\'t have to worry about keeping things organized. The main compartment can store clothes, documents, travel necessities. The laptop compartment holds not only tablets and computers, but also books. And side pockets hold umbrellas and cups for easy access. ?[Multi-Pockets & Dry and Wet Separation] - There are several small pockets inside and outside the personal item backpack, which are convenient for you to store power banks, charging cables, cell phones, maps, keys, pens and other items that you can use at any time. The wet bag is made of high density waterproof material, which can help you separate dry items from wet items, if you have wet clothes or towels, you can put them in the wet bag. ?[Ergonomic Design & Ventilation] - The back of the travel bag uses thickened breathable mesh padding, which has good air permeability and comfortable fit, you will not feel tired even if carry it for a long time. This backpack is made of durable waterproof polyester with good breathability and heat dissipation, it uses wide S-shaped shoulder straps that are very comfortable to carry and wrap around the entire shoulder, reducing the burden on the shoulder and neck when carrying heavy luggage.