A two-step Korean mask treatment that cools skin and seals in the serum to visibly firm skin and tighten pores for a glass-skin finish. Skin Type: Normal, Dry, and Combination Skincare Concerns: Fine Lines and Wrinkles, Loss of Firmness and Elasticity Formulation: Mask What Else You Need to Know: It's a powerful Korean derma treatment you can do at home.