Nubuck is a type of leather that is made by sanding or buffing the surface of a genuine leather hide, resulting in a velvety texture and appearance. The process of creating nubuck involves removing the outer layer of the leather, which can then be polished to achieve its distinctive look and feel. Nubuck has a more casual and rustic appeal compared to traditional smooth leathers, making it popular for use in fashionable footwear, clothing, and home decor items.