You can buy heat shrink wrap film online in either polyolefin or PVC material options in a large variety of sizes and gauge thicknesses. Polyolefin shrink wrap film is the most popular option industry-wide because of it's high-clarity, eco-friendly properties that are safe for direct contact with food, and the fact that it does not emit any odors or fumes. PVC shrink wrap is a less expensive option and, although it does emit a smell when heated, it does a great job of shrink around oddly shaped items. To use shrink wrap film you will need a heat gun and/or shrink wrap machine. Shrink packaging is used as a way to protect products from dust, tampering, scratches and moisture. Custom printed shrink wrap is also available by special order to act as a marketing tool.