Although new and unused, this item has been stored at home. MUJI Cotton Plain Weave Cover for Legged Mattress Blue Single Set of 2 Individual sale is acceptable at 8800 yen each. Outer fabric: 100% cotton Lining: 100% polyester Filling: 100% polyester I mistakenly purchased this instead of a box spring sheet, and am selling it because I won't be using it. It is unused. How about it for a change of sheets? This is a cover specifically for MUJI's single-size legged mattress. The cotton fabric has been washed, giving it a rough texture. It can be washed at home. Since the return shipping would likely cost around 2000 yen, returns and exchanges are not accepted. Please confirm the photos and description before purchasing.