Kata markets the 3n1 series as "3 carrying positions in 1". I like to call it 3 and 1 = 4 carrying positions, as shown on the left.

In the field, when using the fully-loaded bag in right sling position, I could feel the strain on my shoulder after about 30 minutes. Fortunately, this design allowed me to morph to a backpack which really took the strain off my poor shoulder.

But my favourite is the X-position which allows both long distance carrying as well as providing the quick draw option previously available only in sling bags.

Give it some time and the 3n1-20 will definitely grow on you. This truly unique, one-of-a-kind bag will attract copycats for sure. In the meantime, it is King of the Hill!