18'x33' Oval Polyester Geotextile Pool Liner Pad — 1/8" Thick Water-Resistant Underlayment for Above Ground Pools (Resists Punctures)

Pre-cut to fit the 18'x33' above ground pool size you ordered, this polyester geotextile pad installs beneath the liner as a durable underlayment. At 1/8" thickness it provides heavy-duty protection from undergrowth and other sharp objects, helping prevent grass and roots from growing through the liner and resisting punctures. Water-resistant construction. It is recommended to replace this pad each time you change your pool liner.