Each piece is thick, thick and the fibers are fine for elasticity and durability.The inner material is made with a 0.6 inch (15 mm) thick hard filling.Hard cotton is treated with Aomori hiba processing (antibacterial and odor resistant).It is also lightweight, so it is easy to carry, set up, and clean up.By using the connecting joints, you can easily connect multiple pieces to fit your room. Country of manufacture: Japan; Material: Outer Material: Ikusa (from Kyushu); Filling: Hiba hard cotton 0.6 inches (15 mm); Back: Jointed hem: PP; Product Size: 1 tatami: 82 x 164 x 1.7 cm); Half-tatami mat: 32.3 x 0.7 inches (82 x 1.7 cm); Specifications: Normal weaving joint; Design Registration No.