Provides your pool floor with a subtle layer of cushioning and underlayment that creates a soft pool bottom under your feet while also protecting the underlayment from potential damage. Installs without tape or other materials. If you have a round, oval or irregular size or shape pool, easily trim it to suit your needs. Made of strong felt material that allows moisture to pass through safely.Protect your liner from cuts and punctures from rocks, tree roots, walnut grass and glass found on the ground. Above Ground Pool Liner Pad1pcs. Due to the lighting effects and filming angles, there is a color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size.