Our exclusive PolarShield safety covers keeps your pool water clean and balanced while protecting loved ones from accidental intrusion into your pool. Includes an extra foot of over hang on each side!. Just order for the size of your pool and we will include the extra cover to help keep it pinned down over the winter. Our TightMesh filters debris as small as 40 microns, omitting the introduction of dirt, debris and sunlight. The elimination of sunlight makes spring opening a breeze, reducing the need for additional maintenance and chemicals. This product includes a complete 2 year warranty with an extended 12 year prorated warranty.