Vegetable-tanned hides for creating your own leather projects. In addition to the vegetable tans link here, also see the “cow hides” and lamb hides” menus and choose “vegetable tans.” See their very informative Leather Buying Guide . Free swatches. “Vegetable tanned leathers are tanned using strictly organic materials such as tree bark. They possess warm deep colors. As veg-tan leather ages, it absorbs the light, oils, and air that it is exposed to which cause their colors to become more rich.”