How To Use Protective Bags in Product Packaging

In today’s sensitive shipping arena many products are shipped in containers and trucks and then spend weeks waiting to get to market. How do you protect your product from Mother Nature and other elements? There are several types of protective bags or pouches that can be used in packaging.

Mylar and Foil

Moisture barrier bags also known as foil bags or Mylar are one of the most effective and widely used protective bags on the market. These two styles of bags protect against moisture, oxygen, dust mites, dirt, pests and ultraviolet rays. Most people are very familiar with Mylar if you have bought a shiny balloon any time in the past. This type of barrier bag protects against corrosive damage caused by humidity, moisture, salt spray, aromas and many other airborne contaminants. Mylar bags can also be used as a cover or wrap for your product. These bags come in a variety of sizes and colors and can be custom printed with your company logo or information.


Mylar and foil bags are a great way to protect your product but in a harsh shipping environment they will not work if tore or ripped. Once ripped or exposed, the protective barriers in place will no longer be useful. That is when you would look to a heavy duty Tyvek bag. Tyvek is a material developed by Dupont and is made of high density polyethylene which to the touch feels like a combination of paper and fabric. Tyvek is a multi-faceted material that is vapor permeable but water, chemical, puncture and tear resistant which proves it to be an outstanding protective bag. There are many types of Tyvek mailing envelopes, but a popular one you may be familiar with is the White, 10 x 13 mailing envelope that looks like cloth and is as strong as steel.

Bag construction

Bags can come in several configurations:

  • Sachet – three sided seals and one open for easy insert of your product
  • Bags with a Tear notch – ‘V’ grooves on either side of the bag for easy opening
  • Flat bottom bag – Usually referred to as “gusseted” bags and are used to hold more volume as you can fit more product into them
  • Stand-Up Bags – Gussets are used on the sides and/or the bottom to create a larger base for standing on its own on a shelf
  • Ziplok Bags – Can be stand-up, gusseted or Sachet style but with a recloseable “zipper” feature for protection from dirt, air and moisture

All of the above styles can be heat sealed to fully secure and lock in your product so the elements will not be affected. In addition, these bags can be customized and made to order in any configuration, size, color and quantity. If you are looking to protect your product from the elements of shipping the answer is easy: use either a Mylar or a Tyvek bag.

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