Natasha's first armor was likely built using salvaged materials and her own engineering expertise. It would have served as a basic proof-of-concept, providing limited protection and functionality.

After gaining more experience, Natasha would have upgraded her armor with more advanced technology. This might include improvements to its defensive capabilities, offensive weaponry, or communication systems.

Depending on the continuity, Natasha may have collaborated with John Henry Irons on armor development. This would have allowed her to benefit from his experience and access more sophisticated technology and designs.

As Natasha's career progresses, she designs armor tailored for specific missions or environments. This might include underwater armor, stealth armor, or armor designed to counter specific threats.