In Japan, these coveted sponges are beauty secret known as POLISHING BALLS / Tsuya no Tama.
Upon harvest, Konjac bulbs are cleaned and boiled into a gelatinous mass, then formed into individual cakes or sheets, which are cured outdoors over the winter months.

During the process snow, sun and wind repeatedly moisten, dry and bleach the konjac, transforming it intothe percfect skin polishing textures.