Soft cotton feel, stretches both vertically and horizontally to fit the mattress. Used for about six months from January 2025. It's a soft and very comfortable material. I'm selling it because I haven't been using it recently due to a change in bedding size. ・There is no major damage, but because it is a very soft material, it tends to pill, so there are quite a few small pills on the surface. ・Compatible size: Single to Wide Single Height: 8-20cm / Width: 91-97cm / Length: 195-200cm ・Composition: 95% cotton, polyurethane ・Official website price: ¥6,050 ・Other: Can also be used with Muatsu products purchased before March 2023 (including Muatsu Sleep Spa and Muatsu Plus). ・I personally used it with the "Showa Nishikawa 20 Year Muatsu Mattress Single (Wide Single) [X (X) Regular]". *This is a tri-fold type.