The backpack can open freely at 90 to 180 degree like a suitcase.Easy to take. Multiple slots design keep your belongings well organized.(can store Laptop,ipad,charger,mouse,notebook,headphones,clothes and all your small accessories. Convenient & Comfortable, soft padded back panel close to your back tightly,ergonomics and adjustable padding shoulder straps and sturdy handle offer you comfort for a long time. the front side is made of waterproof and cut-resistant fabric. Built-in USB PORT is convenient to charge your cell phone by a connected power bank (not included) ,great for charging your phone.