The Pool Pillow Pal is an EASY way to place your pool pillow in the pool and keep it centered and secured throughout the closing season until you're ready to swim again! It will help to anchor the cover in windy conditions as well so your cover won't blow around, which is less wear and tear on your expensive winter cover A pool pillow is also known as an "Ice Compensator". Just as the technical name implies, it compensates for the ice that will form on your pool cover in the wintertime and is used in off-season periods in areas where there are subfreezing conditions. Snow and rain will land on your pool cover and freeze. As the ice accumulates it will act like a glacier and expand outward towards the sides of your pool. If too much ice forms it can damage your pool walls.