Abstract: An inflatable packaging insert as adapted for positioning around and encapsulating an article disposed in a closed box when inflated for providing support and protection for the article during shipping. The packaging insert includes a pair of spaced, opposed V-shaped or triangular inserts forming a gusset on its inner surface allowing the packaging insert when inflated to securely engage the corners and edges of the article. The gusset allows the inner article-engaging surface of the packaging insert to expand as a generally flat surface so that it engages the entire facing surface of the object including its edges and corners in a generally uniform manner. The packaging insert is preferably comprised of a strong, pliable, gas-impervious material such as polyethylene and includes an integral self-sealing valve for inflation and deflation as well as interconnected compartments or chambers formed by heat, pressure or radio frequency (RF) formed seals.