Each item is made entirely of vegetable tanned leather sourced within the USA. A traditional and time-intensive process of treating leather, vegetable tanning uses natural tannins from bark and other plants to stabilize, preserve, and convert the raw hide into the finished high-quality leather. Vegetable tanned leathers are also noteworthy for their high-oil content, providing both softness and strength, as well as a beautiful natural aging and patina over time.