Box Sheet ? 120x190x30cm ? Semi-Double to Double ? Opened, Unused

Hello, nice to meet you.
Thank you for viewing my product.

I mistakenly purchased a box sheet in the wrong size, and since I opened it, I can no longer return it. The packaging is torn and no longer exists, but the item is unused and new.
I am selling it for less than I paid, including shipping, so please consider it if you need it.

This is the product shown in the images. Please check the listing carefully before purchasing.
It is a stretchy material and fits semi-double to double sizes.
Due to lighting conditions in the image, it appears whitish, but it is a navy-like blue.
The package photo is the closest representation of the actual color.

As shown in image 9, it will be compressed in an A4 size zippered storage bag and delivered in a waterproof, shipping-exclusive vinyl bag.

*Please excuse any compression wrinkles.
*The inner zippered bag has been wiped with disinfectant wipes.
*Although it is new, it has been opened once. Those who are concerned about minor details should refrain from purchasing.
*Please check my profile for other important notes.

It will be shipped via Yu-Packet Post using Yu-Yu Mercari Mail service. :)