<b>Greenaholics Cork Mats - 6.3 Inch</b><br><br> These cork mats are made of the oak regenerate bark, so this mat is environmental-friendly product.<br><br> This sturdy cork mat have a moisture water-absorption, if you use them as a planter pot saucer, <br>please pay attention to the watering. Slowly and moderate water will be better. <br>They need the sunshine after using a few days.