MAKE SURE YOU HAVE SUBSTANCE PAINTER 8.2.0 BUILD or higher!
It comes with a fairly basic Unity package! The bones and armature in both FBX files have been tweaked so you can make a proper fist and give a thumbs up with the Valve Index Knuckles controllers! You'll also find that there are already setup prefabs with VRChat's SDK attached!
The already setup Avatar 3.0 has a few toggles and right hand gestures. You can toggle on and off the multiple articles of clothing included. There is also 4 sweater designs that you can choose from, simply done with basic material swaps.
Speaking of designs and materials, there is 2 fully fledged Substance Painter files included! You can make your own sweater design or simply recolor any article of clothing you want! You can even give the bandaid little heart if you so desire. Don't be afraid to express yourself!
Substance is the recommended program for editing the textures, as a lot of time and effort went into organizing and setting it up!