Going to use same model as Prowl belt.
Camping pad foam inside a cloth material sleeve, that is bolted/screwed to vinyl board pieces.
The vinyl strap with belt clip is threaded in between the foam pad and connects in back.
Using grey as the base under-cover color as it matches the tote bin color grey.
This is the Hound G1 concept I am modeling belt design from.
I might even leave a space for the Autobot logo.