Following is a transcript of the video. Narrator: If you look at Iron Man's first suit, the Mark 1, and compare it to the hero's nanotech suit from "Avengers: Endgame," a lot has changed.

Other MCU heroes, most recently Anthony Mackie's Sam Wilson in Captain America: Brave New World, have swapped their physical suits for nanotechnology, which makes suiting up a much smoother process.