text1: How much of normal is the oxygen breathed in space suits?
text2: In the case of spacesuits, the O_2 partial pressure in the breathing gas is, in general, about 30 kPa (1.4 times normal), and the resulting O_2 partial pressure in the astronaut's arterial blood is only marginally more than normal sea-level O_2 partial pressure (for more information on this, see space suit and arterial blood gas).