Did you know you can basically add whatever you want to Rimworld?
Here's some fancy leathery stuff made from VFE Medieval 2's hard leather and some chemfuel. It's quite a good material, you'll like it.
Requires VFE Medieval 2
(obviously)
How fancy?
Max HP: 180%
Sharp armour: 120%
Blunt armour: 50%
Heat armour: 170%
Cold insulation: 20c
Heat insulation: 20c