Belt ----> Backpack?

Backpacks would be a really awesome addition to our current array of customizable options.

I'd like to see them be part of the belt slot or even part of a top armor or something that way they could be implemented without adding an additional slot or using the pouch slot.

Could even be a plausible way to implement capes!

I don't know much in this area but I'm sure there would be clipping issues with shields/weapons but weapons and shields could appear to be poking out of the bag or be replaced when wearing the backpack - so it seems you're pulling your weapon out of your bag, etc.

Any ideas for backpacks or other alternative gear types that might fit into gear slots that we already have? Backpacks are a feature I'd really like to see in FFXIV!