Vegetable-tanned leather is tanned using tannins extracted from vegetable matter, such as tree bark prepared in bark mills.  One of the best features of vegetable-tanned leather is that it develops a darker and rich patina over time with prolonged use and exposure to the environment. This leather starts out reasonably stiff but gets softer and supple with time and use. Caring for vegetable-tanned leather:To keep this leather looking its best it is important to treat it regularly. Here are some tips: Avoid letting your leather product get wet specifically during the first month of use. After a month, the leather becomes more...