A spacecraft suit is a specialized outerwear designed for use by astronauts during space missions. Synonyms for this term include space suit, extravehicular suit, lunar suit, pressure suit or EVA suit. These suits are used to protect the wearer from the harsh environmental conditions of space, including extreme temperatures, low pressure, radiation, and micrometeoroids. They also provide the astronaut with oxygen, water, and waste management systems necessary for survival in space. This specialized attire is crucial for successful space missions, and advancements in technology continue to improve the design and capabilities of spacecraft suits.