Thank you for viewing! [New, Unopened] Insulation Sheet - 3 Tatami Mats Energy-saving measure! Place it under your carpet to block cold air from the floor! ◯ 4mm thick with cushioning ◯ Size Approximately 180 x 240cm, thickness 4mm ◯ Soundproof Class 1 ◯ Anti-slip treatment on the aluminum surface ◯ Packing size Width 45cm Length 64cm Thickness 15cm I am selling this because I no longer need it. It is new and unopened. ※ Management number 216