New, Unused Nishikawa Dehumidifying Mat Single Set of 2 Package damaged, but contents are new and in good condition. ◆ Nishikawa Sangyo Dehumidifying Sheet (Single) with Moisture Sensor ◆ Single Size: 90 x 180cm ◆ Contains silica gel to absorb unpleasant moisture. This dehumidifying mat can be placed under your current futon or mattress. ◆ Absorbs sweat, moisture, and odors for a comfortable, dry feel. It prevents mold growth and keeps away dust mites, so you can always sleep comfortably. ◆ Can be used on a bed or the floor. For a bed mattress, place the dehumidifying mat on top of the mattress and then place a bed pad on top of the mat. For a futon, place the mat directly on the floor and then place the futon on top of the mat. ◆ Can be reused by drying. It has a moisture sensor that changes color to indicate when it needs to be dried. When the sensor changes color, dry it in the sun or with a futon dryer. ◆ Size: 90 x 180cm ◆ Surface Fabric: 100% Polyester, Back Fabric: 100% Polyester, Middle Material: Silica Gel Type B, with Moisture Sensor