Winter Pool Cover Air Pillows - 4 ft. x 4 ft.
Relieve your pool walls from freezing water expansion stress!When placed under your winter cover, this rugged 16-gallon vinyl pillow attracts freezing water as it expands to relieve pool walls from the stress of water expansion! These multi-purpose pillows also help reduce the build-up of rain, leaves or snow on your winter cover.Actual pillow shape is square and only needs to be inflated half-way.