Since 1976, our heavyweight pool liners have been custom built, hand folded, and boxed by Crystal Pool employees at our liner and cover manufacturing facility located in Lancaster County, Pennsylvania. Our liners are available in 20 mil or 30 mil thickness as well as beaded or overlap styles. All pool liners manufactured by Crystal Pools are constructed from 100% virgin vinyl (no reground material) and are sealed utilizing microwave heat-sealing machines. All printed liners have a special clear coating over the print to protect the pattern from harmful UV sun rays, chemicals, and fungus. Our 20 mil liners carry a 20-year warranty while our heavyweight 30 mil liners come standard with a 25-year warranty. Please call our stores for a price quote.