OXA Large Fashion Vintage Canvas Laptop Computer Backpack Travel Backpack Daypack Rucksack College Bookbags Outdoor Camping Hiking Sling Backpack College School Gym Bag Weekend Bag for Men and Women Khaki Main material: This backpack is made of 95% high density cotton canvas and 5% genuine leather zips, it's very durable. Structure: A total of 7 pockets. 1 main Pocket, 2 Side Pockets, 1 front zipper pocket, 2 inner pockets and 1 laptop sleeve. Approx Dimensions: 12" L x 18" H x 7" W Capacity: 25L (Large capacity, fits up to 15" laptop). Two large side pockets can hold bottled water, umbrella, cell phone or any other item that you need quick access to. There are 2 durable plastic buckles on 2 sides which can adjust the backpack to keep your item regular in the backpack.