Clear "cello" bags made of 100% virgin, high clarity polypropylene film. Polypropylene is a material that has FDA and USDA approval for food packaging. These Bags are made of sturdy clear 1.2 mil polypropylene bags. Great for packaging bath bombs/fizzies, soaps, candy, photos... CASE OF 250 CLEAR CELLO BAGS (4" x 6").