What kind of material is the 'nubuck leather' mentioned in the bag description?

Nubuck is a material where the outer surface of cowhide is finely sanded to raise a gentle, velvet-like nap. MOONDAL chose cowhide nubuck, given a nap through a sanding process by Italy's montebello, as the bag fabric^[1]. Unlike suede, which raises a nap by scratching the inner side of the leather, it processes the outer layer of the raw hide as it is, maintaining the solid durability of cowhide while delivering a soft touch.

The thing to avoid most when handling such nubuck leather is hot heat. If you dry the bag with heat-generating devices like hair dryers or irons, deformations such as shrinking of the surface or twisting of the shape occur^[2][3]. Generally, when genuine leather comes into contact with high heat, fiber tissues rapidly shrink and even the inherent oils escape, making it prone to hardening stiffly. When it comes into contact with moisture or snow, do not use heating appliances; instead, gently pat away the moisture with a dry cloth and dry it slowly in a shaded, well-ventilated area.