Our vinyl liners are precision cut using computer robotics, which means you get an exact fit every time.We use heavy mil virgin vinyl that's specially treated to resist bacteria, fungus and ultraviolet rays for years to come. The smooth, vinyl surface of your pool is durable, easy to clean and virtually maintenance-free in all types of weather conditions. All of our vinyl swimming pool liners are 20 mil vinyl, with 27 mil vinyl available in select swimming pool liner patterns. 27 mil vinyl patterns have an additional cost of $400.