Genuine leather B7 system notebook, approximately 250mm x 150mm, with a 2-hole binder. - Material: Genuine leather (nume) - Model: B7 System Notebook - Size: Approximately 250mm x 150mm Thank you for viewing. From cutting to sewing, it's all handmade with care. We have lavishly crafted it from a single piece of leather so you can fully enjoy the natural characteristics of the leather. Please pick it up and feel the deepening flavor as you use it. ※ Due to the nature of leather products, the color and texture may change with use. ※ Natural leather is used. There may be stains, scratches, blood vessels, and wrinkles. ※ The size is measured with a scale and there may be slight errors. ※ The actual product may differ slightly in color depending on the monitor environment. ⚠️ All products are handmade. Due to being handmade, there may be minor scratches during production and imperfections in thread processing. There may be scratches and wrinkles unique to leather. As it is a natural material, there may be natural leather scratches, processing stains, and [odor]. There may be scratches and wrinkles unique to leather. ⚠️ Genuine leather: Please be careful of mold (requires regular maintenance). ⚠️ On Mercari listings, There seem to be many fake leathers (PU leather, synthetic leather, faux leather, soft leather) mixed in. Please be careful when purchasing. [The price is significantly different from genuine leather.] All of my products are [genuine leather]. (Genuine leather is not affected by a regular lighter flame) We appreciate your understanding before purchasing. ◾️Tanning (Nume Leather) This is a plant-based tanning method using "tannin," a component found in the astringency of red wine and tea, and is said to be the oldest method. Also, leather that has undergone tannin tanning is called "nume leather." It can take several months to tan, requiring time, effort, and space, but it allows the tannin components to be slowly absorbed into the leather without burdening it. As a result, it is durable and less likely to tear, and it is characterized by increasing softness and changing texture over time. The more you use it, the more you can enjoy the aging process and the unique expression of the leather.