The sponge is 100% natural by fermenting the edible konjac fiber. No chemical additives added. Gently Massage and Exfoliation. Improve the blood circulations and remove the dead cuticles. No stimulation. The very gentle texture has no stimulation to any skin, so it's very suitable for sensitive skin and baby's skin. Natural Konjac : Suitable for all type of skin. Bamboo Charcoal : Control the oiliness. Suitable for oily/combination skin.