[ Material] Made from heavy-duty, puncture-resistant pvc, this pillow withstands harsh winter conditions for continuous pool easy to , deflate, and store for convenience. [Standard Size] The pool pillow measures 1.2 x 2.4 meters, providing effective cold for swimming pools by reducing pressure on pool walls and keeping the cover . [Easy Inflation Process] Equipped with large valve openings for effortless inflation, simplifying the pool antifreeze process and allowing quick and efficient pool easy deflation for storage. [Debris Prevention Design] Placed under the pool cover, the pillow creates a space that prevents water and debris from accumulating in the center of the pool, extending the life of the cover. [Ice Compensator Function] The pool pillow absorbs ice and expanding water pressure to protect your pool and cover from winter damage, ensuring year-round for your pool.