The Konjac (Kon-Yak) sponge is made from the Konjac root, a porous vegetable that grows native to Asia. The Konjac plant is naturally alkaline, helping to balance the pH of our skin. A Konjac Cleansing Sponge is an all-natural, gentle, cleansing exfoliator. Pure Konjac - This universal sponge may be used on all skin-types including the most sensitive skin, even the delicate under eye area. Bamboo Charcoal Konjac - Enriched with bamboo charcoal which helps to unclog and tighten the pores and fights acne-causing bacteria. Bamboo Charcoal Konjac may be used on any skin type but is best used on combination or oil prone skin.