This is a grain leather that has been slightly brushed on the surface to create a very fine velvet-like appearance. The texture of nubuck is finer than suede.
About Wedge Heels:
Wedge Heels are shoes with a wedge heel that runs under the foot, from the back of the shoe to the middle or front. Wedge Heels have a heel with a triangular, wedge shape that can range from low to high heels.