A skinned mesh is 3 things: 1. The mesh (Torso_Armour) 2. The skeleton (mixamorig:Hips) 3. The weights that tie the mesh vertices to the bones in the skeleton So, if you're trying to build a "torso armor only" skinned mesh, you need the Torso_Armour, the skeleton which the torso armor attaches to, and the weights (which are part of the skeleton). If you look in the Mount Point's Demo folder, you'll find my Shirt_01 as an example: I built this in Maya based on the Mixamo rig. This becomes its own .fbx file that you can use with other Mixamo skeletons. I think that answers your question.