Vegetable tanning uses bark, leaves and branches from trees and plants to add natural tones to the leather. The tanning involves a gentle process over several weeks of treatment that allows the leather to have a much longer life than chrome-tanned leather. The natural process causes the leather to develop a patina over-time with prolonged use and exposure to the environment. Each piece made with the natural leather has its own unique shades and nuances, so you know your wallet over time is uniquely yours.