Very roomy. Great as an overnight bag, carry-on or good for day-trips and expeditions. * Product Material: Microfiber * Product Weight: 1.15 lbs. * Contoured fit to the natural curve of your back * Adjustable 1 1/2" wide shoulder strap * Four exterior pockets: quarter flap 12" by 9", back 6" by 4 3/4", open 12" by 10" and zip 12" by 9" * Integrated shoulder strap distributes weight evenly * Interior key ring clip * Interior of bag is finished with nylon * Interior pockets include: 7 open organizer pockets and 1 zip pocket * Nonslip adjustable grip on the shoulder strap