-- Expandable Design -- This backpack size (LxWxH) 11.8 x 7 x 16.9 inches / 30 x 18 x 43 cm. This travel backpack features 5 compartments. The main compartment features a smooth-access zipper on the side. Unzipping it opens up to a generous 38 liters of storage, allowing you to store more items easily. The spacious main compartment holds outfits for 3-7 days-- Long-Lasting and Durable Material -- This computer backpack is made of Water-Resistant Nylon and smooth zippers (zippers are not waterproof), which can provide adequate protection for your electronics and valuables, and the waterproof backpack can cope with all kinds of weather.-- USB-C Charging Port -- Keep your business backpack powered up wherever you go! Plug a power bank into the backpack and easily charge your devices through the external USB-C port without opening the backpack. (Note: Power bank and data cable are not included)-- TSA-Approved Luggage Strap -- This carry-on backpack features a 180° lay-flat opening that makes packing and organization easy. A dedicated 17-inch laptop compartment ensures your device stays protected. The top quick-access pocket is great for sunglasses, passports. Large vertical file pocket and front slip pocket for quickly tossing in items. Its built-in luggage strap attaches to suitcase handles, enabling hands-free navigation through terminals.-- Comfort Lightweight -- The expandable backpack features ergonomically designed shoulder straps with foam padding to relieve shoulder pressure. A breathable 3D mesh back panel wicks away moisture. An adjustable, non-slip sternum strap holds the load during exercise. Its lightweight design and anti-theft pouch ensure comfort for both urban commuting and outdoor hiking.Descriptions:Color:GreyMaterial: NylonCapacity: 35LSize(LxWxH): 11.8 x 7 x 16.9 inches / 30 x 18 x 43 cmPackage included: 1 x Backpack