Astell&kern Ak-240 Minerva Leather Case Ak240-cover Black Premium 100% genuine Italian leather case made by Buttero Minerva leather, originated from Badalassi Carlo was chosen for the case. Badalassi Carlo was made by Professor Carlo Badalassi, who is known for his excellent skills with leather. The leather case for the AK240 was made from a process called Full Vegetable Tanning. This traditional method has been used in Italy for over 200 years. The process brings out the special characteristic of leather while creating a natural tanning look. A variety of trees and plants are involved in this tanning process which takes about 40 days to complete and only the most experienced professionals in Italy possess the skills to do it. This special leather material has a lot of oil in it that will allow the leather to shine the more it is used. Many tests and trials have been done with the creation of the leather case in order to highlight the unique design of the AK240. Material : Italian BADALASSI CARLO MINERVA Leather