POF and PVC Shrink Bags provide your package with a crystal clear, sealed, and clean look. It keeps dust and moisture away from the product. The wrapping prevents unwanted damage, tamper-proof packaging, and deters pilfering. Re-wrap items which have been opened. All you need is a shrink material (film bag or tubing), sealer (hand, I-bar, or L-sealer), and heat source to shrink the film (heat gun or shrink tunnel).