This is the requested BB Bag.
I use the same type bag everyday, because I love it's function so much!
It looks normal from outside.
A simple bag with a flap, and a zipper pocket at the back.
It has two gathered pockets under the flap,
And a compartment inside has 3 small pockets, and,
OH! a zipper compartment at the back!
You can store your valuables inside this compartment
so even the pick pocket manages to open the flap,
he still needs to open this zipper, and this extra task will hopefully deter him.
But this double protection is only for unwanted hands.
To you, it is your best buddy, because
Only you can access the valuables easily from this back zipper!!