Do cooling mattress protectors really work?

They work in the sense of adding less warmth than an ordinary protector, and phase-change fabrics do buffer heat at the surface. Treat the effect as modest: a protector cannot make a warm mattress cool.

What material is coolest for a mattress protector?

Thin, open fabrics that move moisture: Tencel/lyocell, bamboo-derived rayon and light cotton knits. Polyester and thick cotton terry hold more heat, and quilted fill adds the most of all.

Is a waterproof protector a bad idea for hot sleepers?

Not with a modern breathable membrane. The difference between a thin laminated knit and no protector at all is small for most people; the difference between that and old vinyl sheeting is not.

Does a cooling protector help with night sweats?

It can make the surface feel less clammy, because moving moisture away matters more than raw temperature. A waterproof layer also keeps that moisture out of the mattress, which is the longer-term benefit.

Mattress protectors · Updated October 2026

Best Cooling Mattress Protectors

Slumber Cloud Performance Mattress Protector ($159–$199) is our pick for hot sleepers — its face fabric is built to move heat rather than simply cover the mattress — with Tempur-Pedic TEMPUR-Protect Breeze ($99–$169) the next best construction. No protector cools a bed on its own; the goal is to add as little insulation as possible.

Best cooling

Slumber Cloud Performance Mattress Protector

$159–$199 · Hot sleepers and night sweats

Best overall

SafeRest Premium Mattress Protector

$30–$45 · Most sleepers

Best for memory foam

Purple Mattress Protector

$79–$119 · Memory foam and adaptive-grid beds

Best budget

Lucid Encasement Mattress Protector

$20–$35 · Full coverage on a budget, rentals, bed bugs

A cooling protector is solving a problem the protector itself creates. Any waterproof layer sits between you and the cooling features you paid for in the mattress, so the honest question is not which cover cools, but which cover gets in the way least.

We rank this page on construction: how thin the membrane is, whether the brand specifies it as breathable, and whether the face fabric moves moisture or holds it. Marketing language alone does not move a product up the list.

Our protector rankings combine hands-on testing where we have it with research evaluations for products we have not physically tested. Every protector currently in this cluster carries a research evaluation: construction, verified manufacturer specifications and long-run owner feedback rather than instrumented lab testing. Specifications verified September 14, 2026.

Compared side by side

Protector	Score	Testing	Waterproof	Material	Cooling	Noise	Stretch	Feel impact	Fits depth	Washable	Dryer	Warranty	Price (Queen)	Best for
Slumber Cloud Performance Mattress Protector	9.1/10	Research evaluation	Waterproof	Outlast® phase-change fibres over a breathable membrane	Excellent	Excellent	Good	Good	Up to 18"	Yes	Low heat only	5 years	$159–$199	Hot sleepers and night sweats
Tempur-Pedic TEMPUR-Protect Breeze	8.8/10	Research evaluation	Waterproof	SmartClimate® cool-to-touch face over a waterproof membrane	Excellent	Excellent	Good	Good	Up to 18"	Yes	Low heat only	10 years	$99–$169	Thick premium mattresses
Avocado Organic Waterproof Mattress Protector	9/10	Research evaluation	Waterproof	GOTS-certified organic cotton jersey, plant-based waterproof barrier	Good	Excellent	Good	Excellent	Up to 16"	Yes	No	1 year	$99–$149	Organic and low-emission bedrooms
Purple Mattress Protector	8.7/10	Research evaluation	Waterproof	Stretch jersey knit with polyurethane membrane	Good	Excellent	Excellent	Excellent	Up to 17"	Yes	Low heat only	2 years	$79–$119	Memory foam and adaptive-grid beds
SafeRest Premium Mattress Protector	9.2/10	Research evaluation	Waterproof	Cotton terry surface, polyurethane backing	Average	Good	Good	Good	Up to 18"	Yes	Low heat only	Lifetime replacement	$30–$45	Most sleepers
Lucid Encasement Mattress Protector	8.4/10	Research evaluation	Waterproof (6-sided)	Polyester knit with waterproof membrane	Below average	Average	Average	Average	Up to 16"	Yes	Low heat only	15 years	$20–$35	Full coverage on a budget, rentals, bed bugs

Cooling, noise, stretch and feel ratings on this page are editorial assessments based on published construction and specifications — not lab measurements. Scroll the table sideways to see every column.

* We may earn a commission through affiliate links. This doesn't affect our reviews.

The ranked picks

Research evaluation

Slumber Cloud Performance Mattress Protector

Slumber Cloud · $159–$199 · Outlast® phase-change fibres over a breathable membrane

9.1/10

The strongest construction in the group for temperature: Outlast phase-change fibres sit above a thin breathable film, so the fabric buffers heat instead of simply insulating it. It is the most expensive fitted protector we track, which is the only reason it is not the default pick.

Phase-change fibres absorb and release heat, and the membrane is specified as breathable — the most credible cooling construction in the category.

WaterproofFitted (5-sided)Cooling: ExcellentNoise: ExcellentFits Up to 18"5 years

Pros

Phase-change fabric aimed squarely at heat
Waterproof without a heavy laminate
Soft face — no plastic hand feel

Cons

✕Expensive for a protector
✕Phase-change effect diminishes with repeated laundering
✕Only a 5-year warranty at this price

Who it suits: Hot sleepers and night sweats.

Check price

Research evaluation

Tempur-Pedic TEMPUR-Protect Breeze

Tempur-Pedic · $99–$169 · SmartClimate® cool-to-touch face over a waterproof membrane

8.8/10

The premium fitted option, and the one sized for tall builds: Tempur-Pedic specifies fit on mattresses up to 18 inches, and the SmartClimate face is a cool-to-touch fabric rather than a marketing sticker. The 10-year warranty is the longest of any non-budget cover here.

Cool-to-touch surface fabric plus a thin membrane; a credible cooling construction, though the effect is about initial contact rather than all-night airflow.

WaterproofFitted (5-sided)Cooling: ExcellentNoise: ExcellentFits Up to 18"10 years

Pros

Cool-to-touch surface fabric
Sized for mattresses up to 18 inches
10-year warranty

Cons

✕Highest fitted-protector price here
✕Overkill on a thin or budget mattress
✕Sold mainly through authorised retailers

Who it suits: Thick premium mattresses.

Check price

Research evaluation

Avocado Organic Waterproof Mattress Protector

Avocado · $99–$149 · GOTS-certified organic cotton jersey, plant-based waterproof barrier

9/10

Organic cotton jersey with a plant-based barrier rather than a PVC film, GREENGUARD Gold certified for emissions. The jersey knit is the quietest, least noticeable face in the group, which matters if crinkle is the thing that put you off protectors.

Cotton jersey breathes better than terry, though it does not cool actively.

WaterproofFitted (stretch knit)Cooling: GoodNoise: ExcellentFits Up to 16"1 year

Pros

GOTS-certified organic cotton
No vinyl, PVC or phthalates
Quiet, soft jersey face

Cons

✕Premium price
✕Must air dry — no machine drying
✕Short 1-year warranty

Who it suits: Organic and low-emission bedrooms.

Check price

Research evaluation

Purple Mattress Protector

Purple · $79–$119 · Stretch jersey knit with polyurethane membrane

8.7/10

Built around stretch rather than padding. The jersey knit gives in every direction, which is what you want over memory foam or an elastic grid: the protector follows the surface instead of spanning across it and flattening the contour.

Open knit over a thin membrane; breathable for a waterproof cover, but not a phase-change fabric.

WaterproofFitted (stretch knit)Cooling: GoodNoise: ExcellentFits Up to 17"2 years

Pros

Very stretchy — minimal effect on mattress feel
Quiet and thin
Fits mattresses up to 17" deep

Cons

✕Short 2-year warranty
✕Costs more than basic waterproof covers
✕Thin face offers little cushioning if you wanted some

Who it suits: Memory foam and adaptive-grid beds.

Check price

Research evaluation

SafeRest Premium Mattress Protector

SafeRest · $30–$45 · Cotton terry surface, polyurethane backing

9.2/10

The default recommendation, and the one that suits the widest range of beds. A cotton terry face over a polyurethane film blocks liquid on the sleeping surface without the stiff plastic hand of cheap vinyl covers, and the lifetime replacement policy removes most of the risk from a sub-$45 purchase.

Cotton terry is absorbent rather than actively breathable, so it is the middle of the field for warm sleepers.

WaterproofFitted (5-sided)Cooling: AverageNoise: GoodFits Up to 18"Lifetime replacement

Pros

Lifetime replacement policy
Quiet knit-and-film construction rather than crinkling vinyl
Soft terry face that works under any sheet

Cons

✕Not a cooling design
✕Terry can feel warm in a hot bedroom
✕Skirt is not waterproof

Who it suits: Most sleepers.

Check price

Research evaluation

Lucid Encasement Mattress Protector

Lucid · $20–$35 · Polyester knit with waterproof membrane

8.4/10

The only construction here that seals all six sides, which is what full liquid coverage and bed-bug containment actually require — and it costs less than most fitted covers. The trade-offs are a zipper you can sometimes feel and a polyester face that breathes least in the group.

Polyester face and full enclosure make this the warmest option here — not a hot-sleeper choice.

WaterproofEncasement (6-sided)Cooling: Below averageNoise: AverageFits Up to 16"15 years

Pros

Full six-sided coverage including the skirt and underside
Cheapest way to protect an entire mattress
15-year warranty

Cons

✕Zipper can be felt through thin sheets
✕Least breathable construction here
✕Polyester face is not as soft as cotton

Who it suits: Full coverage on a budget, rentals, bed bugs.

Check price

What actually makes a protector sleep cooler

Three things: thickness, membrane breathability, and the fabric touching your skin. A thin film under an open knit lets moisture vapour through and adds very little insulation. A thick quilted cover behaves like a light blanket between you and the mattress.

Phase-change fabrics buffer heat by absorbing and releasing it, and cool-to-touch finishes affect how the surface feels when you first lie down. Both are real effects. Neither converts a warm mattress into a cool one, and both fade as the fabric is laundered repeatedly.

Thin, unquilted construction beats any cooling claim on a padded cover.
Look for a membrane the brand describes as breathable or moisture-vapour permeable.
Tencel/lyocell, bamboo-derived rayon and open cotton knits move moisture better than polyester or terry.
Full encasements enclose more of the mattress and generally sleep warmer than fitted covers.

Waterproof and cooling at the same time

You can have both, within limits. A thin polyurethane film bonded to a breathable knit blocks liquid while still letting vapour pass, which is why it has replaced vinyl almost everywhere. What you cannot get is a waterproof cover that breathes as well as a plain cotton sheet.

If temperature is your only concern and you have no spill risk at all, a non-waterproof cotton or Tencel cover will always run cooler. Most people still take the membrane, because sweat is itself the slow damage protectors exist to prevent.

Will a protector undo my mattress's cooling features?

Partly, and unavoidably. Gel layers, phase-change panels and airflow channels all work at the surface, and a cover sits above them. The practical answer is to minimise what you add: one thin protector, breathable sheets, and no extra quilted pad on top.

If you sleep hot enough that this matters, the bigger levers are the mattress and the bedding rather than the protector. Our cooling mattress guide covers those.

Best Cooling Mattress Protectors

Compared side by side

The ranked picks