Swimline is the leading manufacturer of above-ground pool liners in all popular patterns, for a wide range of pool shapes and sizes — round, oval, rectangular, octagonal, decagonal, kayak pools, and more. Our liners are constructed from heavy-duty, 100% virgin vinyl and protected with Lamiclear™ technology to help resist chemical damage, UV fading, and cold cracking. That includes our Unibead® liners — a Swimline-engineered design that installs as either a beaded or J-hook liner for added versatility. Known for consistent quality and reliable performance, Swimline liners are a trusted choice for long-term pool protection.