Ring-Suits
Description: imagine a spacesuit made up of a series of snug but not skin-tight blue-grey-green rings that resemble hardened ooze. Bits of metal and plastic are interspersed at various joints.
These biological spacesuits are perhaps a bit physically unaesthetic, but Ring-Suits are the gear of choice for anybody mining a planetary system’s Oort Cloud. They’re ‘biological’ entities that originated on comets: a ‘wild’ Ring can function in a temperature range of just above absolute zero to about 120 degrees Fahrenheit. Above that point, they go into hibernation indefinitely, and can survive temperatures just below that of boiling water. Rings instinctively stack one on top of each other, effectively forming an impenetrable barrier that produces a hollow internal space that can be slowly warmed via waste heat (which the Rings then use to maintain life functions).
Or you could put a human inside: the Rings can be easily trained to cover a person in concentric rings, flowing carefully around life support, sensor, communication, and propulsion devices. The resulting Ring-Suit thus becomes an extremely flexible sealed suit that is carefully insulated against the chilling cold of the Outer Dark, not to mention any stray radiation out there.
Also: being so much more well-fed than their wild cousins allow Ring-Suits to regenerate themselves more effectively, not to mention reliably and regularly reproduce themselves. Thus, it is a spacesuit that breeds more spacesuits. This can be handy, when you’re far from the Inner Glow of a star system.
Lastly, it just feels nice to wear a Ring-Suit. The Rings aren’t intelligent, but they do react well when they are surrounding a toasty warm heat source; and they seem to broadcast this feeling of comfort and amiability on a psychic wavelength that humans can hear. The humans return the feeling, which is why one should never threaten an Oort-man’s Ring-Suit. Every other Oort-man within perception range will take offense if and when someone does.