That looks amazing! What a brilliant design!
The current version of the Proofgrade leather is very light tan, unfinished, vegetable tanned kip leather. Extremely high quality. If you let it wear naturally it will darken to a mid-tan. You can oil it with all sorts of products, stain it, rub it with wax, use water to mold it… all sorts of cool stuff.
It’s really easy and fun to work with!