18' Round Above-Ground Pool Liner Pad — 1/8" Polyester Geotextile Extender, Puncture-Resistant

Pre-cut to the above-ground pool size you order for an exact fit. Designed to be placed beneath your pool liner, this pad creates a heavy-duty barrier that blocks undergrowth and stops grass from pushing through the liner. Constructed from water-resistant polyester geotextile at 1/8" thickness for durable protection. It’s recommended to replace the pad each time you change the liner to maintain optimal performance.