▶ Product description Our Master Lab Sheet Mask Collection features an ultra-thin hydrating sheet mask made of natural cellulose for even and consistent absorption of active ingredients. Each mask features a customized formula that targets specific skin concerns. ▶ How to use 1. Apply mask on clean and towel-dried face. 2. Keep mask on face for 20-30 minutes. 3. Remove mask and gently pat excess serum onto face and neck until fully absorbed. TIP For an extra cooling and soothing effect, store your masks in the refrigerator.