Nume leather is a leather that is tanned with tannin, which is also an ingredient in plant traffic. Because the fibers are fine, the fibers will gradually become soft and familiar with hard objects at the beginning. The more you use it, the more the color gloss becomes deeper and turns into a candy color, and it will change to a very tasteful texture. The picture shows a business card holder, approximately three years of use (left) and unused (Right).