This is an accessory backpack for 1/12 figurine models / paper craft models out there to use.
Rocketman Tan builds it for his stormtrooper figma but I say we can use it for whatever figurine/figma/ paper craft we have as it fits everyone in the 1/12 scale category.
Assembling the backpack is super easy with only few parts needed cut and glue. In contrast with Japan school backpack we have before which requires more parts and harder in assembling.
Rocketman Tan always made steampunk kind of paper craft and if you visit his devianart page he has all sorts of steampunk/military models to build.