Soundproofing Mat (Unopened)

I purchased this for soundproofing my digital piano ?
This is an unopened item that has been stored at home.
It was stored rolled up.
It is an unopened item still in its original transparent film.

I bought it as a soundproofing mat, but
I am listing it because I haven't had the opportunity to use it.

Please check the photos for size and condition.
As it is unopened, I have not measured the exact size, but based on the typical size of digital piano soundproofing mats, I believe it is approximately 50-70cm deep x 150-160cm wide.
It will be shipped with simple packaging.
This is a home-stored item, so please only purchase if you understand this. Thank you ?