The all-natural bath sponge. The luffa plant has many fascinating uses at different stages of its life cycle. When left to dry, a luffa sponge remains. Traditionally, from Africa to Asia, the luffa sponge is rubbed against the skin to remove dead skin cells, revealing glowing skin. Attached to an 18 inch teakwood handle, the Boub Luffa Back Scrubber lathers well and gently exfoliates your entire back, leaving skin softer with hardly any itch.