This 2-piece cloth mask set includes pre-soaked, specially cut pieces designed for the upper and lower portions of your face. You press and mold the damp cloths to your skin, leave on for up to 20 minutes, then remove the cloths and massage the product that remains into your skin. None of this is essential, especially when you consider the whitening ingredients in this mask are found in all of the other Whitening Source products from SK-II, as well as several less expensive products from Olay, whose parent company (Procter & Gamble) also owns SK-II. There is no research proving SK-II’s Pitera ingredient has any effect on uneven skin tone or brown spots, not to mention that when it comes to skin lightening, what you do daily is far more important than what you do occasionally, which is likely how you’d use this mask (as a “special” treat, perhaps once per week). All told, the formula for this mask is relatively simple and not worth the investment. The good ingredients it contains are best utilized via other skin-care products, and you can leave this at the counter.