This leather is "Vono Aniline" from Tochigi Leather, so you can enjoy the changes in color and luster over time. Many people have already spoken about Tochigi Leather, so I won't say much, but it is one of the world's leading tanneries specializing in tannin tanning, and a source of pride for Japan. [Specifications] Source: Tochigi Leather ⇒ Hashimoto Sangyo Material Name: Vono Aniline Leather: Cowhide Steer Color: Black Size: A4 size (210mm x 297mm) Approximately 6.3DS *There may be slight variations due to hand cutting. Number of sheets: 2 Thickness: Approximately 1.0mm *Varies depending on the part *Easy to sew even for those unfamiliar with leather Luster: ☆☆☆★☆ Hardness: ☆☆☆★☆ Backside: Core-dyed, same color, with marking stains Tanning: Full vegetable tannin tanning *Pit tank tanning Packaging: Will be shipped in a box to prevent folds and wrinkles. [Notes] ・We have photographed the entire A4 size and its four corners, but please note that there may be scratches, wrinkles, and stains that are not fully captured in the photos. ・As it is natural leather, please understand that there may be variations in the leather due to individual differences (differences in appearance depending on the part), scratches, color unevenness, wrinkles, and scuffs. ・The red tag and scale are for photography purposes and are not for sale. ・Please understand the quality of home storage and the simple packaging for shipping before purchasing. (Please refrain from purchasing if you are looking for a perfect product) ・Please note that the color of the image may differ from the actual product due to the photography. ・We are sorry, but we cannot accept returns or exchanges due to customer's circumstances. ・This product is also listed on other sites, so please forgive us if it sells out. Thank you for viewing.