Used Once [PRACTICAL STRUCTURE]: Back Zipper Closure,Effective anti-theft design. 1 main zipper compartment with 1 interior zipper pocket and 1 interior slot pockets, 2 side pockets and 1 front zipper pockets. Multi-pockets could fit your A4 books, iPad, cell phone, umbrella and keep your daily items well organized. [DIMENSIOIN & WEIGHT]: (L) 12.20 x (W) 5.91 x (H) 12.60 inches, 1.41 pounds. It's lightweight and comfortable for you to carry everywhere you want. [WELL-DESIGNED]: You can carry it as a single-shoulder bag or backpack as there is a removable short shoulder strap. Water resistant backpack keeps your items from not easily getting wet.