A sporty backpack made of polyester.
Its shape can be switched from 2D to 3D by opening 2 sets of snaps on top and at the bottom.
The main compartment (which closes with a zipper) has 2 inner pockets with zippers, a pocket for the phone and a snap hook for keys. Outside it has 2 hidden side pockets.
17.3 x 10.6 x 4.7 inch