Fallout: New Vegas Power Armor

Power Armor are types of armor

Gameplay
A suit that provides its wearer with protection from damage, as well as enhanced strength. In Fallout: New Vegas, power armor is found in a variety of locations throughout the Mojave Wasteland. It can be obtained by completing quests, looting it from enemies, or buying it from merchants. In order to wear power armor, the player character must first acquire Power Armor Training, which can be obtained by completing the quest Still in the Dark and then completing Eyesight to the Blind or Tend to Your Business, or by completing the For Auld Lang Syne quest.

Variants
 

Behind the scenes
An unused variant of power armor, Remnants Tesla armor, exists in the game files.