¥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, just place it under your futon or mattress. You can wash it in your washing machine at home. (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 it as a guide.) How to Use ・For beds Place the dehumidifying sheet on top of the bed mattress, and then put the bed pad on top of it. ・For futons Place the dehumidifying sheet directly on the tatami mats or floor, and then put the futon on top of it. 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 or seeking perfection.