I didn’t see the packaging listed on the website outside of a recent recall. As of September 19, 2023, the wrappers are made of plastic. I wouldn’t suggest inhaling fumes from its combustion.

https://news.kraftheinzcompany.com/press-releases-details/2023/Kraft-Heinz-issues-voluntary-recall-of-select-Kraft-Singles-American-Processed-Cheese-Slices/default.aspx