Use after preparing your skin with Infinity Moisture Concentrate Treatment Base. Dispense an appropriate amount of foundation onto the sponge and spread evenly over your skin. Because the foundation is soft, gently glide the sponge over the surface to apply the foundation. Applying too much pressure may result in too much foundation being removed. A replacement sponge, the Infinity Makeup Sponge E (sold separately), is also available. (How to set up): Place the refill container in the case for the Infinity Emulsion Pact (sold separately). Remove the refill container from the storage bag, and with the lid still closed, insert it into the recess on the left side of the case, then press down until it clicks. (How to remove the refill container): Open the case and, with the lid still closed, flip it over. While pressing the lever on the right side in the direction of the arrow, push the refill container. Use your hand as shown in the illustration to prevent the refill container from falling. To prevent the ingredients from evaporating, immediately close the lids of the refill container and case tightly after use. If you will not be using the product for an extended period of time, close the lid of the refill container tightly, then place it in the storage bag and close the zipper tightly. A dirty sponge will cause the foundation to spread poorly and become damaged. Always keep it clean. If the sponge becomes dirty, gently wash it with warm water diluted with a mild detergent, then rinse thoroughly to remove all detergent, drain, and dry completely in the shade before using again.