For the finest sanded surfaces and smoothest finish coats, Nortons premium SandWet sanding sponges are hard to beat. Coated on both sides, they can be used either wet or dry to achieve an evenly sanded surface and ultra-smooth finish. Whether used on wood, metal, fiberglass or between coats of finish, they promise to cut faster and last longer than traditional sanding sponges. Used wet, they are particularly useful for reducing the amount of airborne dust in your shop. The sponges are made from a higher density foam than usual, which prevents them from absorbing water, but still easily conforms to contours. The grit is clearly printed on the side of the sponge where it wont wear off. Simply rinse and reuse, youll be amazed at the durability.