Some of these bags/pouches come already filled with air while others require inflation with a manual or electric pump. The latter takes up a fraction of the space required for other forms of packaging and are preferred by companies and small business which ship items on a regular basis. They are made from LDPE making them tough and rigid.
Because they are designed for specific items, you can be assured that your product does not move around and is well cushioned and protected from impact during transit. Used as replacement to expanded polystyrene peanuts, these alternative packing system has eliminated the mess associated with the clingy foam peanuts.