This material was wrapped around the foam, it’s made out of PET, the same material bottles are made of. It was quite easy to melt, and to shape when hot. But I figured the best way to use it was to wrap it around the foam again, to make the cushions more soft and the edges less sharp.
Since I did not use all of it, I’m bringing the leftovers to the recycle centre because PET is one of those types of plastics that can be recycled.