The Vevor pool liner pad is designed for 12' round above-ground swimming pools to help protect the liner from punctures, weeds, and ground abrasion. Made from extra-thick geotextile fabric, it adds a cushioned layer beneath the pool for a cleaner and more comfortable setup. Its durable construction helps extend liner life and reduce maintenance over time. The pad can be trimmed for installation on a variety of pool base surfaces including grass, sand, concrete, and wood.