Domo Naturafill cork does not absorb water; it is moisture-resistant. The cell walls contain a natural resin that makes Domo Naturafill impermeable to liquids. This means that Domo Naturafill cannot get wet on the inside. A Domo Naturafill cork pitch therefore has excellent drainage properties. Moreover, it is not susceptible to damage by extreme heat or cold extremes, or by stretching or shrinking.