La Prairie Skin Caviar Luxe Sleep Mask has the following features: More than a mask, more than a night cream. It is a delicious hybrid that instantly melts into the skin where it works its magic overnight. During sleep, the body is in a ""repair and replenish"" mode. This mask has been designed to take advantage of the body's resting status to help skin with critical functions. It purifies and refines skin, and thoroughly replenishes it with moisture during the night. Caviar Extracts enhances firmness and plumps lines. An overnight sensation delivering noticeable results quickly. In just one night, skin will greet a new day with fewer visible wrinkles, a firm look, a smoother texture, and the look of a healthy glow.