DURABLE AND NEW MATERIAL:Made of Water Resistant and Scratch resistant material, Including Waterproof zipper in front pocket.The bottom is made of wear-resistant material. HIGH CAPACITY&POCKETS: one separate laptop compartment hold 17 inch Laptop as well as 15.6 inch MacBook/laptop,one separate ipad pocket. Packing compartment roomy for books, mouse, charger, binders,, clothes, pen,etc. Mesh pockets at side for water bottle ,compact umbrella and Others. CONVENIENCE&SAFE: A luggage strap allows backpack fit on luggage/suitcase, slide over the luggage upright handle tube for easier carrying. With a hidden anti theft pocket on the back protect your valuable items from thieves. USB DESIGN&RELIABLE: With built in USB charger outside and built in charging cable inside,this usb backpack offers you a more convenient way to charge your phone while walking. High quality rust-proof hardware and shoulder strap button ensure peace of mind. SIZE&WEIGHT:18.5’H*13’L*8’W inch,Weight:0.96kg/2.12lb,Computer compartment suit for17 inch computer,Exclusive ipad air2 pocket,It can meet most of your requirements.