Head-to-head · Best Cooling Pillows

Coop Sleep Goods Cool+ Adjustable Pillow vs Slumber Cloud UltraCool Pillow

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Slumber Cloud UltraCool Pillow comes out ahead by a clear margin (4.5 vs 4.0). Slumber Cloud UltraCool Pillow is best for: Hot sleepers who want sustained cooling and prefer the soft, moldable feel of fiberfill to foam or latex. Read the strengths below before deciding.

Ranked #5 in Best Cooling Pillows

Coop Sleep Goods Cool+ Adjustable Pillow

4.0

1 source$149as of Nov 5

For hot sleepers, the Coop Cool+ is the clearest upgrade Coop has shipped in years: a phase-change gel cover over plus-shaped foam that breathes about 50% better than the original Eden. Tom's Guide and HGTV both crowned it the best adjustable cooling pillow of the year, and the 100-night trial makes the price easier to stomach. Choose it when you want the adjustability of shredded fill alongside contact-cooling.

Strengths

— Dual-firmness flip design: one side runs supercooled and firmer, the other softer and cushioning
— Adjustable fill with included extra Oomph bag — shape it from pancake-flat to chunky side-sleeper loft
— GREENGUARD Gold and CertiPUR-US certified with a 100-night sleep trial and 5-year warranty

Watch-outs

— Heavy at over 4 lb queen — re-fluffing the shredded fill takes more effort than a down alternative

$149 · Check Price on Amazon Full review →

Higher ratedRanked #2 in Best Cooling Pillows

Slumber Cloud UltraCool Pillow

4.5

1 source$92.2as of Sep 25

The Slumber Cloud UltraCool Pillow puts Outlast phase-change fabric, the material Slumber Cloud built its bedding line on, into a soft down-alternative pillow. Apartment Therapy rated the adjustable version 4.5 out of 5. The 30-night trial is the shortest here.

Strengths

— OEKO-TEX STANDARD 100 certified, with cover and fill both machine washable
— The Adjustable model's two-insert system changes the firmness profile substantially
— Outlast treatment is worked into the fibers rather than laminated on top

Watch-outs

— Polyester fiberfill feels less breathable than latex or silk in a humid room

$92.2 · Check Price on Amazon Full review →

How they stack up

Coop Sleep Goods Cool+ Adjustable Pillow

More adjustable than the Slumber Cloud UltraCool and the Saatva Latex Pillow, both of which fix loft at the factory. Sleeps measurably cooler than the Cozy Earth Silk Pillow once you actually put a case on it, because the Cool+ cover keeps its bite through cotton. The Purple Harmony beats it on raw airflow, but the Cool+ is the only pillow here you can rebuild from a flat 3-inch profile to a 7-inch slab in two minutes.

Slumber Cloud UltraCool Pillow

It trades the adjustable loft of the Coop Cool+ for the Outlast fabric, which is the more proven temperature-regulating material in this category. It cools harder on contact than the Saatva Latex Pillow, though the Saatva's airflow story is more consistent in a hot bedroom, and it is roughly level with the Purple Harmony on temperature while feeling much softer.

Specs side-by-side

Spec	Coop Sleep Goods Cool+ Adjustable Pillow	Slumber Cloud UltraCool Pillow
Material	Gel-infused memory foam + microfiber	Down-alternative polyester fiberfill
Fill	Plus-shaped shredded foam (adjustable)	100% polyester fiberfill (adjustable on Adjustable model)
Cover	Cool-touch knit with PCM layer	100% polyester knit with Outlast coating
Cooling Tech	Phase-change gel + Q-max 0.38 cool-touch surface	Outlast phase-change material (NASA-derived)
Loft Adjustable	Yes — add/remove fill via zipper	Yes on Adjustable model; fixed on standard
Sizes	Queen 17x27, King 17x33	Standard 20x26, King 20x36, Body 20x48
Certifications	CertiPUR-US, GREENGUARD Gold	OEKO-TEX STANDARD 100
Trial Period	100 nights	30 nights
Warranty	5 years	180 days
Care	Machine wash cover cold, tumble dry low; spot clean foam	Machine wash cold, tumble dry low
Loft Options	None — fully adjustable (add/remove fill)	—

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