"Spacecraft suits" can be referred to using a variety of different synonyms. Some of the most common alternatives include "spacesuits," "extravehicular activity (EVA) suits," "orbital suits," and "astro-suits." These names all emphasize different aspects of the same basic technology: suits designed to protect astronauts and other personnel during space travel or when working outside of a spacecraft. Other, less common alternatives include "moon suits," "Mars suits," and "lunar suits," which are all used to describe specialized suits designed for use on specific celestial bodies. Whatever the name, these suits are essential to ensuring the safety and success of human space exploration.