... logo expanding file,expanding bagmaterial: eco-friendlyPPexcellent appearancea big space can be used to place books, mobile phone ,etcopaque ,assorted color and ... :A4,F/C, or Legal, letter size etc.Color:any color is availableCan be made according to customer's requirement ... .Advantage:Good and eco-friendly material with nice design, expanding file is convenience for student,teacher, office to use it. ...