business travel bag backpack

1.Good pratical business bag,Portable, single shoulder, shoulders back all three types

   are compatible to the bag,that is super business bag.
2.6CM extended function,it canenlarge the bag's capacity in an instant,you can put what

you want to take completely.such as laptop,tablet,paper file,or some small things etc.
3.It larghly can accommodate a 16.4 " notebook computers, and various types of tablet

computers, there are nylon bag to fix it, the grid can receive all kinds of cable, It's really

a perfect load.

4.Using the waterproof material,it can protect the things from water.