This is a hunting apparel brand from the US.
It's a type of waist bag, but it has an interesting structure that allows you to carry it on your shoulder.
The part that touches your waist is made of a thick urethane-like material, and it has a wire, probably for protection in case of a fall.

You can search for Badlands Monster Fanny Pack on the manufacturer's website or Amazon for more details.
You can also find images of people wearing it.

This is a brand new, unused item, but it has been handled by someone, so please purchase a new one if you are sensitive to this.

It was on sale on the US website, so I'm selling it for less than that price.


Badlands
Monster Fanny Pack with
Fold Down Workstation

Product Information