The Prestige collection is AB grade (select and better). AB Grade, which is the highest grade of wood flooring possible. At this grade, wooden planks are cut from the center of the log where the wood is most uniform in appearance with minimal color variations. AB Grade wooden planks offer very few and almost unnoticeable/unobtrusive knots. Sap content at this grade is very low to nonexistent. In general, wood at this grade offers a clean, uniform look that is often found in new and modern homes. AB grade flooring is frequently selected by interior designers simply because of its luxurious, uniform and aesthetic appeal.