arises when discussing Immersion Proof Breathers and their performance
when subjected to water vapor and immersion in water. The
hydrophobic properties of the membrane prevent the breakthrough
of liquid water, but allow the continuous permeation of water vapor.
Other gases with a similar molecular size (~3.1Å or less) to water vapor
also permeate through the membrane. Most panel mounting Immersion Proof Breathers
can be fitted with a Desiccator to adsorb water vapor and other contaminants.