materials:600D ripstop polyester + 210D lining                                                  size:W40*H30*D13cm                                                                structure:                                                                         
>one main zipper compartment closed with flap                                            
>one back pocket closed with velcro                                                
>dual side pockets colsed with elastic                                            
>inside:cellphone pocket,net pocket,penholder,front zipper pocket                       
>adjustable shoulder strap