The LUNA Charcoal Facial Sponge is made from the roots of the konyakku plant and infused with charcoal. The sponge is ideal for daily use, especially for sensitive and acne-prone skin. For the first use, soak the sponge in warm water for 10-15 minutes until it puffs up and rehydrates. It expands about 50% and will be squishy.