![Winterizing Air Pillow 4' x 5'](http://amazon4fun.ca/cdn/shop/files/airpillow-4x5_{width}x.jpg?v=1695907162)
Air pillows are essential in winterizing your pool! When they are placed under your winter cover, they absorb freezing water as it expands. Pool walls are relieved from the stress of ice expansion during the winter. An air pillow will concentrate the build-up of rain, leaves and/or snow on your winter cover for easier clean up!