Abshoo Unisex Classic Waterproof School Rucksack Travel Backpack 15.6Inch Laptop Backpacks (Black) Material:High quality Waterproof lightweight Polyester and Smooth SBS Zipper Approx dimensions: 17.1" x 11.8" x 5.1" ( HxLxW); Capacity: 19 Liters Main compartment with double-zipper closure; 1* front zipper pocket can carry some small things;2*side pockets can carry a water bottle or a umbrella;1*External USB Interface.(Please noted that this backpack doesn't power itself, usb charging port only offers an easy access to charge); Main compartment with double-zipper closure; 1* front zipper pocket can carry some small things;2*side pockets can carry a water bottle or a umbrella;1*External USB Interface.(Please noted that this backpack doesn't power itself, usb charging port only offers an easy access to charge); Breathable and Anti Sweat shoulder straps, relax your shoulders and offer Light weight Carrying. Perfects for many occasions: office work, go to college school, business travel, go hiking, go camping and do other outdoor activities, unisex style for both women and men Main compartment can put notebooks, magazines, Book,A4 files Laptopcompartment canfit 15.6 inch Laptop Interio pocket can put wallet keys or other small items 2 side pockets can carry a water bottle and an umbrella 1 front pocket with buckle closure perfect fordaily supplies 1 Shoulder strap pocket can fit card