The base material used is raw domestic steerhide of the highest quality, tanned with white tannin. In addition, through a further tanning process that combines several types of vegetable tannins, including mimosa, with oil, it achieves a supple texture that cannot be found in ordinary steerhide. The product is then garment-dyed on a highly flexible base. Even after shrinkage dyeing, the leather wear has an extremely soft feel. In addition to the black color from dyeing, the leather is rich in oil, resulting in a deeply saturated black hue. The leather has a soft and light feel, and is also thinner than usual, at 0.6mm thick. This allows for an extremely light fit that can be worn casually, creating a relaxed silhouette. We have produced a half-sleeve open-collar shirt that maximizes the texture and characteristics of the adopted leather for a perfect fit. It is unlined (no lining), making it easy to wear lightly throughout all seasons. The wearing experience is extremely casual, not feeling like leather wear. It's a relaxed, moderately loose-fitting shirt designed for a comfortably casual feel. Even when worn loosely, the drape of the material creates 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 not only provide smooth opening and closing but also add a subtle accent without compromising the texture of the leather shirt.