Highcool 18 ft White Pool Liner Pad for Above Ground Pools & Hot Tubs — 18-Ounce Geotextile (7oz/yd²), Seamless Double-Density

Made from 18-Ounce geotextile (7oz/yd²), this 18 ft pool pad is pre-cut for quick installation and works on sand, concrete or a wooden deck. Available in a variety of sizes, the mat fits round, rectangular, oval or square above ground pools and hot tub liners. Designed to keep water away from metal framing, the liner pad helps prevent corrosion of above ground pool components. Installation is simple: spread a sand base, lay the liner pad, then assemble the pool over the pad. The thick, double-density construction adds noticeable cushioning underfoot while the seamless design with no center seam ensures a smooth, comfortable surface.