[Sarannel Dehumidifying Sheet] - Brand: Nishikawa - Features: Moisture absorption, deodorization, anti-mold, anti-mite, reusable - Size: 130 x 180 cm (Double) - Comfortable year-round, no more dampness. - Simply place it under your futon or bed pad to absorb moisture. - Includes a moisture sensor that changes color to indicate when it's full. [Warm Aluminum Insulation Sheet] - Size: Approximately 3 tatami mats, about 180 x 240 cm - Thickness: 2 mm - Prevents heat from hot carpets and kotatsu from escaping downwards. - Blocks cold air from the floor. - Non-slip - Can be cut to your desired size. - Energy-saving effect - Anti-mite treatment This is not a Nishikawa product. Using the aluminum insulation sheet on the flooring, then the dehumidifying sheet on top of it, and finally your futon, will block cold air and also help prevent condensation.