When comparing these packaging methods it is important to consider that they are suited to different applications.

Flow wrapping is a better option for individual items such as food products, medical supplies or consumer goods where protection from contamination, moisture or tampering is a priority. The advantages of this packing method include its high speed and efficiency, the airtight seals it forms on both ends of the products which reduce spoilage and contamination.  The precise quantity of material required for the packaging is carefully defined making control of the cost very precise. Additionally, the tightness of the pack or bag can be controlled to improve the aesthetics, is a more economic use of packaging and can be adjusted easily.  Uniquely, pre-printed, and fully recyclable packages are enabled. 

Overwrapping or Stretch wrapping, however, is more suited to palletizing goods in logistics, industrial goods and large shipping products. The advantages of this packing method are its ability to provide excellent load stability for transportation, its widely used process with inexpensive materials which makes it an economical option for large or heavy items.

 Which is best?

Stretch wrapping is usually used with food and uses up to 20% more material than flow wrapping as it must overlap itself around the product or pack. While the unit cost difference is comparatively low, when it is grossed up over large production quantities, the overall packaging cost can be quite high.  When efficiencies are factored in, the gap increases still further.

When a comparison is made between flow wrapping and stretch wrapping, flow wrapping is the better choice as a primary packaging material, particularly for fresh food, as it can pack at higher speeds and efficiencies, with increased hygiene and more consistent results.  Most importantly, recyclable packaging can be achieved, through the use of pre-printed materials.