The best quality leather is full-grain leather. This type of leather contains all of the markings present on the leather skin. Depending on the type of animal from which the leather comes, it can show wrinkles, scars, or other characteristics of the animal's skin. The leather is not buffed in anyway, and is heavier than other forms of leather. Full-Grain leather can be purchased either as semi-aniline or aniline dyed leather. Transparent aniline dye allows the natural markings of the leather to show through, while further protecting the leather.