Product information : Function: breathable, waterproof, wear-resistant, shock-resistant, load-reducing Material: imported 420D nylon twill jacquard material With or without rain cover: no Opening method: zipper Color: elegant white, fresh green, noble blue, mysterious black, sheepskin dark gray Size Information: Size: 10.8-11 inches: (30*23*3cm), 12.9-13 inches: ( 35* 25.5* 3cm) Packing list: Computer bag*1