What it is: A limited-edition pair of underye patches made of premium, patented polyester cloth to help erase makeup and cool eyes.What it does: MakeUp Eraser is a premium, patented, polyester cloth made up of millions of tiny hair-like fibers that work together to create a 'suction' for all dirt, makeup and oil in your pores. Double-sided to erase makeup with the short-fiber side and exfoliate the skin with the long-fiber side (side with tag). How to use: Machine wash hot and dry with your towel load. They are fabric-softener and dryer-sheet safe. Soak in warm water. The warmer, the wetter, the better. Use the short-fiber side to erase makeup in gentle circular motions. Flip to long-fiber side (side with tag) to exfoliate. Continue in gentle circular motions.