When a sealed, pressurized vessel (say, you) is exposed to a vacuum (say, space), things tend to get splattery—hence the exo-suits. These fifteen examples of atmospheric apparel from our friends at Oobject are the hallmarks of life-support design from the golden age of exploration.
The suit worn by Laika
Hypersonic refers to speeds of more than Mach 5. The prototype suit being tested here, in a vacuum chamber full of what are presumably heat lamps was for the X-15 plane.
Mounted unworn, it looks like a discarded snake skin.
Designed for roaming around the moon, the odd bell shape means that the wearer can retract his arms inside the suit. Note the tie.
Worn by SR-71 and U2 pilots
There were three suits made and only one worked (not this one). The others had a round viewing window, like a diving helmet, rather than this square, welding mask style one.
I've used this image, because I've already used the other on Oobject and incorrectly, as a diving suit. The Wiley Post suit is where the aesthetics of deep sea and high altitude overlap, before they diverged almost completely.