Mediheal is a Korean skincare brand, and sheet masks are the biggest part of its range at Keauty. You can choose the Madecassoside Essential Mask or the Derma Plus masks in Propolis, Birch and Green Tangerine, and also find ampoules, PDRN Lifting Serum, Vitamin C Brightening Serum, exfoliating and toner pads and eye patches. Sheet masks are a quick weekly step; leave one on for the time shown on the pack.