This item is made of Nume leather and pull-up leather. Pull-up leather undergoes a pull-up process, as seen in Chromexcel. The pull-up process involves pinching (pulling) the leather with your fingers, which causes the oils to shift and create a lighter, whitish appearance (up). The leather is approximately 1.4mm thick and has a soft, supple feel, making it easy to work with. This is a great deal with the mori mori scrap leather set, so why not stock up? Nume leather, vintage processing, oil leather, aging, stamping, carving, water forming, and shibori.