Owner contribution
This is the Kata 3n1-20 slingbag / backback, which is the mid sized bag in the range of 3n1 bags, the others being the smaller 3n1-10 and larger 3n1-30. The 3n1 bags are different from other slingbags in that it can also be used as a backpack plus it can also be used on either the left of right shoulders due to an ingenious system of swapping shoulder straps and hiding the other when not in use. I bought the 3n1-20 bag together with a Lowepro Slingshot 200 to help decide on which bag I preferred. Both bags were very similarly priced and also the size is the same. But I found the Kata better in almost every way.
What works
Design , good quality, materials , left or right handed shoulder options plus can be used as backpack. Holds plenty of gear.
Room for improvement
Difficult to gain access to top two dividers in main compartment.

