This is a sponge that comes with the Esprique BB Spray. It's convenient to have several on hand since you don't have to wash them every time♪ I've been storing them together in a bag. No pets, no smokers. I've checked them and they seem fine, but please refrain from purchasing if you are concerned about any fine dust, as they have been stored at home. They appear to be in clean condition to the naked eye. If you request to buy multiple items, I can offer a 200 yen discount if they can be shipped together.