Ceramides are naturally occurring lipids that make up approximately 50% of the skin's outer barrier. They act like the mortar between skin cells, holding them together and preventing moisture loss. When the barrier is compromised by age, environmental stress, harsh products, or exfoliation, ceramide levels drop and skin becomes dry, sensitive, and prone to irritation. This mask uses Ceramides NP, AP, and EOP — three structurally different ceramide types — because together they replicate the natural ratio found in healthy skin far more accurately than a single ceramide alone, leading to more complete and lasting barrier repair and superior moisture retention.