Large Capacity The external dimension of the laptop backpack is 46 * 31 * 18cm (18.1 * 12.2 * 7.1in), apply to computers up to 17in, as well as 15.6in, 15in, 14 inch and 13 inch. Weight is about 1.14 kg. There are 3 main pockets and 9 small pockets for laptop, iPad, clothes, books, binders, A4 files, pens, wallets, keys, umbrellas, kettles and other daily necessities. Keep everything organized and easy to find. .Fastening: Zipper .USB port and headphone jack design This men's backpack has an external USB charging port, a headphone jack and an internal charging cable. To charge your mobile, iPad or other devices, you just need to connect the USB port to the internal power bank (excluding power bank) of this 17 inch laptop backpack. The headphone jack for listening to music is designed to help you relax on the go. .Multi-function, security, anti-theftThere are anti-theft bags hidden on the back of the laptop backpack, which can protect passports, wallets, phones and other valuables safely and conveniently. The front and side pockets of the backpack have reflective straps to ensure the safety of going out at night. The laptop compartment has a non-slip elastic band to fix the laptop. You can also put the backpack on the suitcase to save labor. .Comfortable and breathableErgonomic design, adjustable S-shaped wide shoulder strap and soft and sturdy handle ensure long-term comfortable use. The shoulder straps and back are made with Lmell a breathable 3D mesh sponge which absorbs and distributes moisture and sweat quickly, relieves the stress of your shoulder and keeps cool for a long time.Ideal for school, college, work, business, leisure, travel, weekend vacation, camping, shopping, etc.Enjoy one year worry-free guarantee. .