The main body material is made from highly rare domestic quality Holstein, and is tanned with vegetable tannins to give it durability and elasticity. Furthermore, during the dyeing process, a larger amount of oil than usual is applied twice to allow it to penetrate over time, resulting in a smooth and moist texture. The finish is finished with dye only, and then each piece is brushed by hand using a kana brush to create the wood grain look that is characteristic of leather. Therefore, he only produces about 10 pieces a day, making it a very rare leather. You can also enjoy the changes over time. The attached leather is made of European raw leather with chrome tanning, which is glass-finished and then finished with special urethane, giving it a matte texture and a rubber touch. It also has a finish that is resistant to friction and color fading.