What is the advantage of a vacuum bag compared to a normal bags?

These bags have a high oxygen barrier performance.
In the case of thin plastic bags, etc., the air in the bag is eliminated immediately after being vacuumed, but after one night, air will be inside the bag.
This is because polyethylene is a material that allows oxygen to pass through easily.
On the other hand, vacuum bags have low oxygen transmission, so they can keep vacuum-packed condition for a long time.

■Product details
Two-in-one automatic vacuum sealer ASV-320D
https://asahi-packaging.com/products/asv-320d/