Lox breathing system with gas permeable-liquid impermeable heat exchange and delivery hose

Life support apparatus comprising:

• a garment for completely enclosing a wearer and constructed for preventing passage of gas from the environment surrounding said garment;
• a portable receptacle holding a quantity of an oxygen-containing fluid in liquid state, the fluid being in a breathable gaseous state when at standard temperature and pressure;
• fluid flow means secured within said garment and coupled to said receptacle for conducting the fluid in liquid state from said receptacle to the interior of said garment;
• and flow control means connected for causing fluid to flow from said receptacle to said fluid flow means at a rate determined by the breathable air requirement of the wearer,
• wherein fluid in liquid state is conducted into the interior of the garment at a rate to be vaporized and heated to a breathable temperature by body heat produced by the wearer, and
• wherein said fluid flow means comprise a heat exchanger including a conduit connected to receive the fluid from said receptacle, said conduit being made of a material which is permeable to gasses and impermeable to liquids.