A type of leather that retains the top or outer texture of the hide. Full grain leather is made up of dense, tight fibers that are water-resistant and supportive. When used to make shoes and boots, full grain leather conforms to the foot over time. It can also be waterproofed, is abrasion-resistant, and will last for years when properly cared for. If this surface faces outward, it’s called smooth-out. When facing inward, rough-out leather protects the tighter fibers of the top grain from abrasion (giving the leather a longer functional life). Full grain leather can vary in thickness, depending on the starting thickness of the hide, and from which part of the hide the leather is taken.