The Rock & Roll Oil Absorbing Volcanic Roller is made of volcanic stone that’s soft to the touch and can gently lift away excess oil that can clog pores. Lightly roll over the T-zone or on other oily areas of the face to reduce shine can be used over makeup without the worry of smudging or used on clean skin. A great alternative to blotting powder or single-use blotting papers: remove the ball, wash, air dry and then reuse!