TRAVEL and EXTRA LARGE:Size of 21.5*16.3*9.9inch.Capacity:55L,DURABLE padded laptop compartment hold for iPad,15.6,17,17.3,up to18.4inch Laptop backpack/computers,Largest main compartment hold for 3-4 days travel clothing.Many hidden pockets can accommodate lots of travel accessories,stationery,notebook, personal toiletries,side Zipper pocket for Easy access essentials,Heavy duty backpack made from high quality polyester nylon fabric for better TEAR,XL backpack perfect for International travel | TSA approved and RFID ANTI-THEFT: At Checkpoint,unfolds the extra large backpack freely 90-180 degree making you quickly through the airport security and keep items tidy,Designed for airplane traveling. The big backpack perfect for indoor/outdoor activities,Served as durable large college school backpack.RFID Pocket with RFID-radio frequency identification help secure personal data encoded on you credit cards,IDs and passports.The anti-theft pocket on the back of backpack,easy to put your phone | Sport Backpack: perfect for young players,room for all their sports equipment and school gear so they don't lose anything, A place for everything: Water bottles, umbrella, cleats, socks, shin guards, jacket, snacks. The most special is Outside pocket, it with adjustable compression straps that full sized basketball,rugby and volleyball.The best love for sports women, men and young college student or high school. | USB Charging Port & Headphone Hole: external USB port with set-in charging cable offer convenient charging your cellphone and other electronic devices.A hole for headphone outside gives easy access to Earphone usage. Also, the student backpack with a sturdy rugged handle with steel cable on the top for carrying, side compression straps keep the exclusive backpack at whatever size you requires. As a mens/women's backpack, you will enjoy fashionable, comfortable and convenient everywhere. | BACK LUGGAGE STRAP&CHEST STRAP: Back U-shaped ventilation design help for the air convection. Adjustable shoulder straps with padding help relieve the stress from your shoulder. A luggage strap allows backpack fit on luggage/suitcase, slide over the luggage upright handle tube for easier carrying;The Adjustable chest strap bring the shoulder straps in tighter to the chest, help you lock your backpack in place securely,prevent the shoulder straps from falling off.