How would you describe something that is "porous"?

The term "porous" refers to a substance that contains many small holes or pores, allowing liquids or gases to pass through it. This characteristic makes such materials capable of being penetrated by air or water, which is essential in various contexts, such as agriculture, construction, and environmental science. For instance, a sponge or certain types of rocks like sandstone are considered porous because they can absorb water. The inclusivity of tiny holes in a porous structure allows it to interact with its surroundings in ways that solid or dense materials cannot, making it a vital quality in many applications.