Universal Protection for Any Surface Durable round pool liner pad is designed to safeguard your above ground pool on all flooring types, including grass, gravel, concrete, dirt, and more. Under pool padding can prevents punctures, weeds, and uneven surfaces for a smooth, long-lasting pool base. Heavy-Duty & Long-Lasting Thickened pool pads for above ground pool are made from high-quality, non-woven felt material, this under pool mat provides superior cushioning and resistance to wear, ensuring your pool stays protected season after season. Easy Installation & Custom Fit No tools required! Lightweight yet sturdy, this pool ground pad can be easily trimmed to fit any shape or size. Simply place the mat under the swimming pool, ensuring it extends slightly beyond the pool's edge. Cut the pad for a custom fit around your pool.