Nodo Nuru Nuru Mask for Sleeping 10-hour humidification duration - Product Name: Nodo Nuru Nuru Mask - Set Contents: 4 sets (wet filter + mask) - Humidifying Sheets: 3 sheets (herb & eucalyptus), 1 sheet (unscented) Please note that the box is for the unscented type. The unscented type has 2 sheets used, with 1 remaining. Although it is new and unused, the box has some folds and dents. Thank you for viewing.