For the main body material, he uses oiled cow leather tanned with carefully selected European full vegetable tannins from IL PONTE, a long-established tannery founded in 1961. The paper is rubbed and finely brushed to create a soft touch and color. With use, this series becomes smooth and smooth, and the oil contained in the leather increases its luster and depth, allowing you to enjoy its unique aging. In addition, the leather that comes with the interior is made of domestic tanned steer leather, which, like the main body material, can be enjoyed as it changes over time. *IL PONTE is a tannery that continues to produce high quality leather using the traditional vachetta method in the Tuscany region of Italy. Specializing in vegetable tanning, he is also a member of the Italian Vegetable Tanned Leather Association and has received his GOLD certification from the LWG (Leather Working Group).