I use two types of leather.

Pebble leather:
Processed bovine leather with a clear “pebbled” grain. It is thicker than Nappa leather and very strong.

Nappa leather:
I use both nappa leather of sheep origin with a smoother surface and bovine nappa leather with a more “wrinkled” surface.
Both are soft to touch and lightweight.

The more unusual colours are often recovery hides from the footwear industry and are therefore only available while stocks last. Once they have run out, I can look for a similar colour but it will not be identical to the previous one.