Hello, I guess we're talking about leather.
Do you own anything made of leather?
I don't own many things made of leather, but it can be used to make a lot of different things because it's durable + flexible.
Yeah I think that is what has made it so useful over the decades, I think I just have some shoes, and belts.
You can actually make leather from deer and elkskin, resulting in some unique products. 
That sounds pretty cool, I wonder if all the leather I own is just cow hide or not.
It's possible, but you can also use lamb and deerskin for softer leathers. So many options!