Answer:
permeable
[ˈpərmēəb(ə)l]
ADJECTIVE
(of a material or membrane) allowing liquids or gases to pass through it.
"a frog's skin is permeable to water"
Explanation:
"Sand is a permeable substance" would be a great example as well.
capable of being permeated : penetrable especially : having pores or openings that permit liquids or gases to pass through a permeable membrane permeable limestone.
