Durable material and moisture protection - The pool pad is made of felt material that is non-slip, wear-resistant, tear-resistant, and designed for long use. It provides a moisture barrier between the ground and the pool, helping protect the pool lining and extend its life. Arbitrary trimming for a custom fit - The pad measures 4 m by 4 m (13.12 x 13.12 feet), large enough for most bathtubs and pools. For pools within 4 meters in diameter, you can easily trim the pad to suit circular, oval, or irregular shapes and sizes. Easy to install and clean - Simply lay the pad flat under the bathtub or pool. It is easy to drop into place and store after drying. Cleaning is simple: scrub with soap or rinse with a hose. Do not bleach. Non-slip and friction reduction - The pad reduces friction between the tub/pool and the floor, helping to decrease wear, noise, and vibration, and extending the life of the pool equipment. It also absorbs splashed water to protect the floor. Use scenarios - As a protective base under portable pools or hot tubs on decks or ground, reducing wear to the floor and preventing moisture damage. - Under a hot tub or spa to stabilize the surface, minimize noise and vibration, and protect flooring. - For irregular or differently shaped pools, trim the pad to circular, oval, or other shapes within 4 meters to create a custom base that guards flooring and contains moisture.