Japanese Traditional Igusa Fabric (Rush Grass) Sleeping Bed Pad on Futon Mattress, Tatami Cover (39 x 78 in.), Twin Size, Made in Japan 100% Rush Grass Size: About 39 x 78 in. Body Weight: 1.5 lbs Material: 100% Rush Grass (Grown in Japan), with Back Rubber Band Made in JAPAN Can be Rolled and Stored.