Rêves en Blanc Single Flat Sheet Gift Boxed ??Reason for Discount

Rêves en Blanc
Single Size White Flat Sheet

- Brand: Rêves en Blanc
- Color: White
- Size: Single
This item has been stored at home long-term, unopened.
?? There is discoloration near the label in the second photo.
The pure white has turned ecru. I haven't unfolded the entire sheet, so I can't confirm, but it's likely only the surface of the boxed item has turned ecru.
Would anyone who understands this be interested?
It could be useful for things like nursing care where a spare sheet is needed.

#KoyukiBedding
Other sheets from the same series are also listed.

Thank you for looking.