The base is made of high-quality domestic steer leather, tanned with white tannin. In addition to several types of vegetable tannins, including mimosa, oil is added and retanning is performed, resulting in a supple texture that cannot be felt in ordinary steer leather. Product dyeing is performed on this highly flexible base. Even after shrinking and dyeing, the leather wear has an extremely soft feel. In addition to the black color from dyeing, the rich oil content of the leather creates a deeply rich black hue. In addition to the soft and light feel of the leather, the thickness of the leather is also reduced to 0.6mm, which is thinner than usual. It offers an extremely light fit, allowing you to wear it casually and create a relaxed silhouette. We have created a long-sleeved open-collar shirt that maximizes the texture and characteristics of the adopted leather, with a fit that makes it easy to wear lightly all year round without a lining. The comfort is very rough, making it feel less like leather wear. This is a relaxed, loose-fitting shirt with a moderately loose fit that encourages a relaxed wearing experience. Even when worn loosely, the drape of the material allows for a natural silhouette. Although it has an open collar, it is equipped with a button loop that allows it to be fastened all the way to the top. The front buttons are Italian COBRAX™ snap buttons, which allow for smooth opening and closing, and the parts are designed to add an appropriate accent without compromising the texture of the leather shirt.