21 Ft Round Seamless Black Pool Liner Pad — Above-Ground Pool Bottom Protector

Designed for 21 Ft above-ground pools, this round liner pad is made from durable, non-woven fabric with no center seam to ensure consistent high density and extended service life. The pad’s thickened construction resists harsh weather and provides a smooth, highly insulated surface beneath your liner. Its high-density material minimizes abrasion between the liner and the ground and shields the liner from sharp objects. Arrives expanded and ready to use with no tools required.