Pool Underlay - The pool mat serves as additional protection for the bottom of your above-ground pool. If you place your pool on a mat, you will protect its bottom from sticks, sharp stones and other impurities that could damage it. The pad is made of solid geotextile with a weight of 110g/m2, does not tear and is water-repellent. Colour: white Material: geotextile 110g/m2. Diameter: 360cm. Provides additional protection for the bottom of your pool.