Liquid Hydrogen boils at 20 Kelvin. This is -253.15 degrees Celsius.
This is also -423.67 degrees Fahrenheit. This is at 1 atm pressure.
Liquid Helium is the coldest liquid at 1 atm. Its boiling point is 4.25
Kelvin.
A suit that is safe to -120 degrees Celsius will not protect the person
from liquid Hydrogen. Now , if you raise the pressure it is possible to
increase the temperature, but at the point that it would be safe to enter,
the pressure would probably be too high.
Lower the pressure, lower the temperature, for those of you who want to know.
Steven B. Fellows
[email removed]