my factory are speciall for produce pof shrink film, LIANJIA Polyolefin is a very strong film. It has very high resistance to tear and wear and it works well with both regular and irregular shaped products. At the same time, it is soft and flexible. Because of its softness and flexibility, polyolefin never gets crispy or brittle. Polyolefin is made of poison free FDA approved materials for food packaging. It has no smell, no odor at all. Great for shrink wrapping card stock, paper stock, booklets, and packages.SAVE MONEY! LIANJIA uses polyolefin film which is very strong, crystal clear, and does not smoke like PVC. Consider a 60 gauge polyolefin can providestronger protection than a thicker 75 gauge PVC shrink film. This gives polyolefin shrink film better value. It means that you can buy more square feet of polyolefin than PVC with the same dollar amount. Our polyolefin shrink film also boasts the best clarity in the market. Its clarity is almost as high as PVC shrink film. It offers higher shrinkage rate as high as over 55% shrinkage rate in all directions.