In order to raise the bar of the SE180 even higher, much attention was devoted to the selection of leather for the case. The leather case for the SE180 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 special characteristics 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.