The material of the bags is a polypropylene film with high transparency.
PP film is rigid, non-stretchable, "noisy", durable. The common name for the film is "cellophane".
Film thickness 30 micrometers.
The bags have a paper-free colorless adhesive tape that allows the bag to be closed. The bag has an extra stiffener (white) with a so-called EURO hole for hanging.
Approved for food use.