The GLI Swimline 4’ x 8’ Air Pillow - 500408AP is a vinyl pillow that is used to help reduce the build-up of rain, snow, or leaves on your winter pool cover. By placing the rugged pillow under the center of the pool cover, it pushes the pool cover up off of the water surface so that your pool water does not freeze to the cover in the winter months.
Specifications:
• 4’ x 8’ vinyl air pillow
• Helps to reduce the build-up of rain, snow or leaves
• Pushes pool cover up off of the water surface to keep water from freezing to cover
• For above ground pools