Vegetable tanning is a traditional method of tanning leather using natural materials, primarily plant-based substances. This process involves soaking animal hides in solutions made from tree bark, leaves, or fruits, which contain tannins. These tannins bind to the proteins in the hides, preserving them and giving the leather its characteristic durability and flexibility. This eco-friendly technique has been used for centuries and is favored for producing high-quality leather that ages beautifully. Unlike synthetic tanning methods, vegetable tanning is biodegradable and less harmful to the environment. Many artisans and brands, such as Horween Leather Company, still use this method to create sustainable leather products.