A peel-off mask is a type of facial treatment that is applied as a liquid and dries to form a thin film on the skin. Once it dries, the mask can be peeled away, removing dead skin cells, impurities, and excess oil. This process can help improve the skin's texture and appearance, making it feel smoother and look brighter. These masks often contain ingredients like charcoal, clay, or aloe vera to target specific skin concerns such as acne, oiliness, or dryness. They are popular for their ease of use and the satisfying experience of peeling them off, making them a favorite in many skincare routines.