Swimline Air Pillow for Above-Ground Pools, 4.5 x 15 ft Blue Ice-Equalizer Cushion — Puncture-Resistant Vinyl

Swimline HydroTools 4.5 x 15 ft Air Pillow cushions your above-ground or small in-ground pool during winter by absorbing ice pressure and keeping the cover clear of standing water and debris.

Protecting a pool through freeze/thaw cycles requires a simple, durable barrier that prevents ice from forcing a cover inward or placing uneven stress on the pool wall. The Swimline HydroTools air pillow is engineered to sit under the winter cover, create a raised center, and act as an "ice equalizer" so expanding ice presses on the pillow rather than on pool structure or the cover seam. Built from puncture-resistant vinyl with a wide inflation valve, this pillow speeds winterizing and stores compactly when not in use.

How does this air pillow protect my pool during freezing weather?

The pillow creates a central cushion so ice that forms under the cover expands against the pillow rather than the pool wall or cover seams. It reduces direct pressure and helps the cover shed water away from the center.

• Absorbs expansion forces from freezing water to lower wall stress.
• Prevents large ice pockets from forming under the cover.
• Keeps the cover raised so melting water runs to the edges.

Will the 4.5 x 15 ft size work for my pool?

This 4.5 x 15 ft pillow fits many above-ground and smaller in-ground pools; it’s a common mid-range size chosen for balanced protection. For very large or uniquely shaped pools, multiple pillows or a different size may be recommended.

• Standard 4.5 x 15 ft dimension fits most round and oval setups.
• Use two or more pillows for larger covers or irregular layouts.
• Swimline offers additional sizes to match different pool diameters.

How easy is installation and storage?

Inflation and placement are quick: the large valve opening speeds inflating and deflating so one person can winterize in minutes. When deflated the pillow folds compactly for off-season storage.

• Wide valve allows rapid inflation with a pump or manual blower.
• Place the inflated pillow in the pool center and secure the cover over it.
• Deflates flat for space-saving storage; wipe clean before storing.

What materials and durability features should I expect?

Swimline constructs the pillow from heavy-duty, puncture-resistant vinyl designed to handle cold temperatures and repeated seasonal use. The material is easy to clean and resists cracking in winter conditions.

• Thick vinyl resists punctures and abrasion.
• Cold-resistant formulation maintains flexibility in low temperatures.
• Simple valve design reduces leak points and speeds setup.

Who is this product for: Pool owners who winterize their above-ground or small to medium in-ground pools and want an affordable, low-effort way to reduce ice pressure, keep cover water-free, and extend the life of their winter cover. It’s especially useful for homeowners looking for a compact, durable pillow that inflates quickly, stores neatly, and can be combined with other Swimline sizes as needed.