Vegetable tanning is a natural and ancestral tanning process, using tree bark and natural waxes.

Calfskin double-tanned is extremely hard and resistant. Especially used in saddlery. This type of calfskin is well known for its patina.

Stains, scratches and patina are an integral part of the aging process. Differences in shades and color gradation can also be considered as guarantee of quality.