Highcool 18FT Round Felt Liner Pad for Above Ground Pools & Hot Tubs — Pre-Cut Puncture Protection

Protect and extend the life of your above-ground pool or hot tub with the Highcool 18FT round pool liner mat. This pre-cut pad is shaped for round pools so you won’t need to measure, cut, or sew — making installation fast and straightforward. Made from durable felt material, it adds stability under the liner while providing soft cushioning for more comfortable footing. When placed beneath the pool liner, the pad creates an extra barrier between the ground and liner to guard against punctures and tears from nuts, stones, roots and other debris, helping to prolong the liner’s usable life. The liner pad also helps prevent staining from soil, fallen leaves and weeds, reducing cleaning and maintenance efforts. A cost-effective upgrade that increases safety, comfort and convenience — especially on hot days when a smooth, protected base makes pool time more enjoyable.