One interesting application is permeable space suit designs. The idea is that instead of encapsulating an astronaut in a flexible pressurized container you put

One interesting application is permeable space suit designs. The idea is that instead of encapsulating an astronaut in a flexible pressurized container you put them in a tight fitting suit that can apply the 3.5 lbs of force per square inch necessary to counter the pressure of the air they breath. Cooling is provided by normal perspiration through the fabric. (Don't forget that vacuum is a great insulator!)