Single High Resilience Mattress, Foldable into Three, Almost New

I recently purchased this from an online store and used it for only two days. I'm selling it because I found a better mattress and no longer need this one.
There is no smoke or pet odor.

I will pack it by layering several plastic sheets and ship it.
It feels a little different from what I expected from a high-resilience mattress, but it's not too soft, and I didn't experience any back pain upon waking up.
I replaced it because I prefer a slightly firmer mattress.
Although it's a mattress, it can be folded like a futon. Since it's only 5 cm thick, it's quite thin, so it's easier to use if you place it on the floor after laying down a mattress.
I think you can use it with the feeling of a thin Japanese futon.
The page where I purchased it states that it is washable.
There were also many positive reviews, but it ultimately comes down to personal preference.

Width: 90 cm, Length: 190 cm, Thickness: 5 cm

This is a used item, so please understand this before purchasing.
Returns are not possible.
I will compress it as much as possible for shipping, so please unfold it after opening and use it after a few hours.
The original packaging was quite small, but it has been restored.
The purchase price was 6,500 yen.