https://www.swiftpak.co.uk/insights/choosing-the-right-shrink-film-pvc-vs-polyolefin compares POF (polyolefin) vs PVC
🙂 POF is safe for foods. 100% Odorless is impossible with any packaging, but POF has fewer odors [no gas]
🙁 POF more expensive.
🙁 PVC requires proper ventilation due to gas release over time.
— heating devices
Some films work with hair dryers, as shown on Shopee. I guess the thinner the easier.