Despite being called a sponge all the materials to manufacture the hydrea london bamboo and loofah exfoliating sponge come from plants first the actual sponge is made using the fibers of the mature fruit from a climbing vine called the loofah which is a fine alternative to both sea sponges and the artificial materials used to imitate them second the fabric surrounding the sponge is made using bamboo which is famous for being a fast growing source of textile fibers and other useful m