This formulations key ingredient is a 30% concentration of saccharomyces ferment - a yeast ferment technology with 3% fermented N-acetylglucosamine (NAG). NAG exfoliates skin surface to help smooth uneven texture and boost radiance. Saccharomyces Ferment 30% Milky Toner also gives all-day lasting hydration, and promotes a stronger skin barrier after 8 hours* after one application. Supported by squalane, this formulation is especially good for dry skin types.