is similar to
able to absorb fluids
"the partly porous walls of our digestive system"; "compacting the soil to make it less porous"
is similar to
(of a membrane) selectively permeable
see also
permitting the unwanted passage of fluids or gases
"a leaky roof"; "a leaky defense system"
see also
admitting of passage or entrance
"pervious soil"; "a metal pervious to heat"