17 inch Laptop Backpack Expandable Men Business Carry-on Flight Approved 40l Travel Backpack

There are different versions from this link.

2.0 : None expanable, 2 main pockets

3.0 Expandable: Expandable

3.0 n Raincoat: Exandable,also with a raincoat as picture shown

3.0 Expandable YKK: Expandable, The only one with YKK zippers now

***All dimensions were obtained by manual measurement of the product, there may be 1-3CM error.

***Green model and Gray model will be little darker than pictures.