Our Bridge Vegetable Tanned Leather it's an untreated vegetable-tanned leather that undergoes a natural tanning process using vegetable extracts, such as tannins found in tree barks, leaves, and fruits. It has a Natural appearance, with earthy colors, that develop a rich, patina over time with exposure to light, oils, and handling, which are more noticeable on the lighter colors such as London, Saddle Tan, and Tabaco. While it may initially feel stiff, it softens with use and develops a unique suppleness over time. It has high absorbency properties, which means it readily absorbs oils, moisture, and dyes. As it ages, the leather darkens and develops a unique character, reflecting the owner's usage patterns and lifestyle.