Konjac sponges are a plant base sponge that is terrific for face usage!  Konjac has been used in Asia for centuries.  The sponge will dry out in between uses.  Simply place the sponge in water for a minute and viola super soft and puffy.  If you have dry skin you can just use the sponge for a light cleaning.  This is something I do often in the winter or if my skin is irritated.