Lomart liners are produced using a special blend of natural, raw materials that insure top-quality vinyl for all liners. The full print liner has ultra-violet inhibitors to protect the liner from the sun's rays as well as enhance longer life. In addition, Lomart's quality premium liners are a full 20 Mils thick on both the sidewall and pool bottom to assure superior performance. All Lomart liners are sealed with Fusion-Weld, a sealing technique, unmatched in the industry, which provides durability and supreme quality. 20 year warranty.