PackFreshUSA Mylar Bags and Oxygen Absorbers

With a 5 Mil thickness and a burst strength of over 140 psi, these bags are significantly more durable than standard storage bags. While they are highly resistant to punctures, it is still best practice to avoid placing items with extremely sharp edges directly against the interior walls.

You will need a heat sealer to create an airtight, permanent closure. A standard impulse heat sealer works perfectly, though some users successfully seal them using a household clothes iron on a medium-high setting, provided you use a flat, heat-resistant surface.

The oxygen absorbers are designed to remove residual oxygen from the bag after sealing, which prevents spoilage and extends shelf life. They are food-safe and non-toxic, though they should remain inside their original packaging until you are ready to place them into the bag with your food.

These bags are designed for long-term, one-time storage. Once you cut the seal to access your food, the bag loses its original integrity and cannot be resealed to the same airtight standard, so they are best used for bulk items you plan to consume all at once.

Yes, these bags are compatible with vacuum sealing. However, keep in mind that the primary preservation method here is the oxygen absorber, which is highly effective at removing oxygen even without a vacuum pump.

The rounded corners are a practical design feature intended to prevent the sharp edges of the bag from puncturing other bags or items when you are stacking them in storage bins or pantry shelves.