The life support and communications system and helmet
- Life support system. The backpack on the back of the spacesuit contains oxygen that astronauts breathe and that pressurizes the suit, a regulator to keep the correct pressure, a fan that circulates oxygen, electricity for the suit, a two-way radio, water for the cooling garment, and a pump that circulates the chilled water.
- Communications system. New suits include an audio system inside the helmet.
- Helmet. It serves as a pressure bubble and ventilation system and has a small foam block to scratch the nose. A protective visor on the outside works like sunglasses.
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