The REVLON Oil-Absorbing Volcanic Face Roller is meant to work like blotting paper to soak up facial oil without removing makeup. You can use it on your T-zone or anywhere your skin is shiny. It's also supposed to be less wasteful than blotting paper because it's reusable and can be washed and air-dried before using again. To clean you unlock and pull out the stone, wash with a gentle cleanser, rinse, air-dry, then place back in.