Foam underlay designed for protecting the bottom of the pool from damage. Made from soft and flexible foam with a thickness of 0.5 cm resembling a puzzle. Thanks to its construction, the mats can be combined as needed and adapted to different pool sizes. The dimensions of one puzzle piece are 50 x 50 cm and there are a total of 8 mats in the package. By connecting all of them, you will create a protective surface of 1.9 m2. The foam can be used under frame pools as well as under support and inflatable pools. It provides effective protection against punctures of the bottom and perfectly insulates the pool from the ground, ensuring that uneven surfaces, stones, or other elements are not felt, thus guaranteeing full user comfort.