Missha Airy Fit Sheet Mask Lemon is a water-type sheet mask that restores radiance to dull skin. Infused with vitamin-rich lemon extract, this mask harnesses the properties of vitamin C and citric acid to even out the complexion. The active ingredients in the formula are kept in their most natural state, due to the cold brew method of extraction; this allows them to retain their original freshness and deliver it to your skin with great safety and effectiveness.