Gentle, Exfoliating Body Sponge Did you know? Konjac sponges have been used for over 3,000 years due to their plant based, mineral rich, collagen regenerating properties? Konjac is made from special Asian Yam roots that are rich in Copper, Magnesium, Zinc and Vitamins A B C D and E. Perfect for use in the shower or after shower as a dry brush treatment!