EMOOR Japanese Traditional Tatami (Igusa) Mattress, Twin-Long Size (39x83), Natural (Undyed), Made in Japan EMOOR's Tatami mattress is light weight and foldable in three to match contemporary life. Easy to carry and move to everywhere, and store compactly when not in use. Igusa is a excellent adjuster with much air inside and uneven surface; Natural air-cleaning function, Humidity adjust function, Deodorizing effect, Sweat absorption function Product Dimensions: Igusa Tatami Mattress: 39 x 83 in (100 x 210 cm) Perfect to use as an underlay mattress for Japanese Futon. Controls humidity, Moderates chilliness from cold floor and helps for your better sleeping. Also as a rug, you can enjoy its smooth and dry touch and natural refreshing scent of rush for your ease and relaxation time. Materials: 100% Natural Rush (Undyed) Non-woven fabric is attached to the back. EMOOR&#039;s Tatami mattress is light weight and foldable in three to match contemporary life. Easy to carry and move to everywhere, and store compactly when not in use. Used high quality rush grown in Japan, and all the processes (drying, weaving and sewing) are carefully worked by Japanese craftsmen. Perfect to use as an underlay mattress for Japanese Futon. Controls humidity, Moderates chilliness from cold floor and helps for your better sleeping. Also as a rug, you can enjoy its smooth and dry touch and natural refreshing scent of rush for your ease and relaxation time. [Dimensions] Japanese Twin-long Size: 39 x 83 in (100 x 210 cm) [Materials] 100% Natural Rush (Undyed) Non-woven fabric is attached to the back. Tatami is a traditional Japanese flooring mat, made of straw or other materials as base with tightly woven natural rush (Igusa) on surface. Ideal material for humid climate, it has been loved by Japanese for more than 1000 years. Used high quality rush grown in Japan, and all the processes (drying, weaving and sewing) are carefully worked by Japanese craftsmen. Natural air-cleaning function --- Igusa absorbs Nitrogen dioxide and Formaldehyde. Humidity adjust function --- Igusa absorbs moisture when humid, and release it when dry. Deodorizing effect --- Igusa also absorbs odor like sweat, pets, cigarettes etc. Sweat absorption function --- Igusa mattress is a best underlay which absorbs sweat during sleep and keeps your futon dry.