G-STEEL x CORDURA The first innovation of Cordura® or cordura fabric technology combined with G-STEEL and GST-W130 / W330. Cordura® is a registered trademark of DuPont Neoprene Coatings. Now is the name listed. This fabric. Manufactured by Invista, which is more than three times more durable than conventional fabric, it has been selected for use in many products such as handbags, shoes, military costumes. The ammunition bag has a variety of shades that are resistant to abrasion, tear, and water resistance.