DESCRIPTION Etude House 0.2 Therapy Air Mask Sheets come in a come in many different varieties. These cotton face mask sheets are all designed to provide hydration and nourishment to your face. Available in 20 types. HOW TO USE After cleansing face and applying toner, carefully remove sheet mask from packaging. Unfold and gently place the sheet mask evenly on your face, smoothing it out onto the skin. Wear mask for up to 20 minutes. Remove mask and discard. Pat skin to aid absorption of excess essence.