¥2,990 I'm selling this because I accidentally bought an extra one. It's arrived and hasn't been taken out of the bag. This is a convenient sheet for moisture control, simply placed under futons or mattresses. It can be washed in your home washing machine. (The moisture sensor cannot be washed.) This dehumidifying sheet uses silica gel, which can be used repeatedly and has excellent moisture absorption and desorption properties. It comes with a moisture sensor that indicates the level of dampness. When the sensor color changes from blue, it's time to dry it. It's okay if it returns to blue when dried in the sun. (Please use this as a guide.) How to Use ・For beds Place the dehumidifying sheet on top of the bed mattress, and then layer the bed pad on top. ・For futons Place the dehumidifying sheet directly on the tatami mats or floor, and then layer the futon on top. It can also be used as a dehumidifying sheet inside a closet. Size For single and single-long sizes: 90 x 180 cm, weight approximately 645g It will be shipped compressed or folded, so please be aware of any creases. This is a used item stored by an amateur, so please refrain from purchasing if you are sensitive to such things or are looking for a perfect item.