Vegetable sponge is a term used to describe two different types of sponges: loofa (5 letters) and LOOFAH (6 letters). Loofa is a type of sponge made from the dried fibrous material of the loofa plant, which is native to India and Africa. LOOFAH is a type of sponge made from the dried fibrous material of the LOOFAH plant, which is native to tropical regions of Asia. Both types of sponges are used for cleaning and exfoliating the skin.