Blue Stone Overlap Liner is made of extra heavy duty virgin vinyl, with super strong welded seams to last long winters and hot summers Overlap liners are made to last. These liners are made of extra heavy duty virgin vinyl, with super strong welded seams to last long winters and hot summers. We uses computerized cutting tables and a computer aided design to make their liners, eliminating the risk of human error. Whether it’s design, pattern or fit, these quality liners are unbeatable. Crack resistant in cold weather climates Super strong double welded lap seams. Maximum protection from the sun’s U.V. rays and pool chemicals Constructed with the most advanced manufacturing process in the industry 52 inch Standard Specifications To purchase this item follow this link: https://canadapoolwarehouse.com/product/blue-stone-overlap-liner/