WINTER AIR PILLOW: 4 x 4-foot air pillow supports your winter pool cover
FOR ABOVE GROUND POOL COVERS: PiIlow is for above ground pools to help prolong and protect your above ground pool cover
NO WATER FREEZING: The pillow pushes your pool cover up off the water's surface so the water won't freeze to your pool cover; Keeps water off the top of your pool cover
EASY ASSEMBLY: Easily inflates through an integrated air valve