Kunisawa's sumi-zome fabric is carefully woven on a shuttle loom that doesn't strain the threads. The high weave density makes the fabric very durable. You can enjoy the fabric's natural texture and color over the years, while it ages beautifully. A technique called "sumi-zome" is used to dye the fabric with binchotan charcoal. It has a stunning texture, similar to that of Japanese washi paper, and is soft to the touch due to the special charcoal dyeing method. Charcoal dyeing is one of the traditional techniques recorded in the traditional Japanese poem "The Hundred Poems of a Hundred Poets," compiled in the Kamakura period nearly 750 years ago. Stylish tool case. Specifications: Snap button, medium fold type. Size: 210 x 110 mm x 25 mm. Materials: Sailcloth made in Japan.