What to sleep under when the duvet is too much

What is the best summer comforter?

A cotton flat sheet, and on the nights that is not enough, the duvet cover on its own with nothing inside it. The duvet is too hot and a sheet alone is too little, and the layer in between is two layers of sateen and no insulation.

See the summer bedDuvets for hot sleepers
A Circadian organic cotton flat sheet folded back over a bed in a wide cuff
Undyed organic cotton sateen, cool to the touch
New Jersey workshop, making pillows since 198160-night sleep trialFree shippingGOTS Certified Organic

The short answer

Build the summer bed from cotton layers you can add and remove. A fitted sheet, a flat sheet over you, and on the warmer nights the empty duvet cover on top, which is two layers of organic cotton sateen and nothing inside them. That is the weight of a duvet with none of the insulation, and every layer of it washes weekly. On a cooler summer night, or with the air conditioning on, a real duvet belongs on the bed. The wool one is the summer duvet. It keeps the air under it dry, and dry is what feels cool. Under your head, buckwheat, which is the coolest surface we make.

The base
An organic cotton fitted sheet with a 15 inch pocket, and a flat sheet over you
The top layer
The duvet cover with nothing inside it, two layers of sateen and no insulation
Cooler nights
The Organic Wool Duvet, which stays dry under you in August
Under your head
The Buckwheat Pillow, or the Buckwool Hybrid with wool on the other side
What to avoid
Polyester and microfiber, which hold sweat against you however thin they are
Colour
The natural colour of the cotton, undyed, which also means no dye sitting on hot skin
Where it comes from
Sheeting cotton grown in Pakistan, wool from New Zealand, buckwheat hulls grown in the USA, all of it cut, layered and sewn by hand in New Jersey
What is not in it
Undyed and unfinished. On the nights you sleep with almost nothing over you, the only thing against your skin is cotton

The short version, in five lines

  • The summer bed is layers you can add and remove, not one thinner duvet. A fitted sheet, a flat sheet, and the empty duvet cover on top when you want weight.
  • The piece people forget in summer is the duvet cover on its own. Two layers of organic cotton sateen zipped shut give you something over you with none of the insulation.
  • If you want a real duvet in summer, it is the wool one. Wool keeps the air under it dry, and dry is what your body reads as cool.
  • Every layer here washes weekly, which matters more in summer than any other season.
  • Under the head, buckwheat is the coolest surface we make. The Buckwool Hybrid carries it on one side and wool on the other.

Layers you can take off one at a time.

A summer bed changes across the night. The trick is having three light cotton layers to hand rather than one heavy one.

A Circadian organic cotton sateen flat sheet turned back over a bed under a wood ceiling, with seals: handmade in the USA from organic cotton sateen, and the GOTS organic label.
The summer layer

Organic Cotton Flat Sheet

A generously cut flat sheet in 300 thread count organic sateen, with a wide double-turned hem. On a hot night it is the whole bed, and it washes weekly.

Best for sleeping under a sheet and nothing else

From $129.00
A bed in a Circadian organic cotton sateen sheet set in a plaster bedroom with garden doors, the comforter heaped on the floor, with seals: handmade in the USA from organic cotton sateen, and the GOTS organic label.
The base

Organic Cotton Sheet Set

Fitted sheet, flat sheet and pillowcases in one undyed cloth. Cotton takes the moisture off your skin, which a synthetic sheet cannot do at any thread count.

Best for replacing a hot synthetic set in one go

From $279.00
A comforter in a Circadian organic cotton sateen duvet cover on a bed in a brick attic bedroom, two dogs nearby, with seals: handmade in the USA from organic cotton sateen, and the GOTS organic label.
Use it empty

Organic Cotton Duvet Cover

Same sateen both faces, so with no duvet inside it is a two-layer cotton blanket. Zip it shut and it is the lightest thing with weight you can put over yourself.

Best for the nights a sheet is not quite enough

From $209.00
Morning sun on a dark wood bed. The Circadian Organic Wool Comforter, a hand-tufted duvet insert, lies thrown back, with the Handmade in the USA seal and the label of GOTS, the Global Organic Textile Standard (Organic, certified by OTCO, GOTS-10229).
For cooler summer nights

Organic Wool Comforter

Hand-tufted organic wool that takes the moisture your skin gives off into the fiber, so the air under it stays dry. It is the duvet people are surprised to keep out in July.

Best for air conditioning, and the last cool nights of June

From $449.00
A Circadian Buckwheat Pillow on a live-edge wood table with its end unzipped and buckwheat hulls spilling out, with seals: rated Best by The Clean List, and handmade in the USA from USA-grown buckwheat.
Coolest surface

Buckwheat Pillow

Air moves between the loose hulls all night and carries your heat out, so the surface never builds a warm hollow. The firmest pillow we make and the coolest.

Best for a pillow that feels hot

From $89.00
A Circadian Buckwool Hybrid Pillow lies on a red daybed in morning sun, unzipped so you can see wool in one chamber and buckwheat hulls in the other, with a few hulls spilled on the cover. The seals read Rated Best by The Clean List, and Handmade in the USA from USA buckwheat and New Zealand wool.
Buckwheat with a wool side

Buckwool Hybrid Pillow

Buckwheat on one side for the surface temperature and organic wool on the other for the sweat. Flip it as the night changes.

Best for hot and damp on different nights

From $99.00
Two pillows in Circadian organic cotton sateen pillowcases on a slept-in bed in a plaster bedroom with branches in a vase, with seals: handmade in the USA from organic cotton sateen, and the GOTS organic label.
Sold as a pair

Organic Cotton Pillowcases

A slip-on case in the same sateen, no zip against your face. The cloth your cheek is on decides more of how hot a night feels than most people think.

Best for finishing the bed

From $79.00

As featured in

Thin is not the same as cool.

The summer aisle sells lightness. What decides whether you sweat is what the fabric does with moisture, and a thin polyester sheet does nothing with it at all.

1

You buy the lightest thing on the shelf

A microfiber sheet or a thin synthetic summer duvet, because it weighs nothing and feels cool in the packet.

2

It cannot absorb anything

Polyester holds almost no moisture. The sweat your skin gives off has nowhere to go, so it sits in the layer of air against you.

3

So a thin layer sleeps hot

Damp air at body temperature is what your brain reads as overheating, and it happens under a microfiber sheet as fast as under a winter duvet.

4

And you end up under nothing

Which is cold once the room drops, and you wake up reaching for the sheet you threw off.

Cotton absorbs, so a cotton sheet takes the moisture off your skin and lets the air around you stay dry. That is why the same weight of cloth feels cool in cotton and clammy in polyester, and why the summer bed is built from cotton layers rather than from the thinnest thing available.

The hem of the Circadian organic cotton flat sheet folded back in a cuff

A flat sheet over you, and the cover on top when you want a little more.

The simplest summer bed is two layers of cotton, one under and one over, in a cloth that takes moisture off the skin. Ours are 300 thread count long-staple organic cotton sateen. The flat sheet is cut generously, so it still tucks after the first wash takes its shrinkage. The hem is wide and double-turned, and folds back into a cuff.

When a sheet alone is not enough, put the duvet cover on the bed with nothing inside it. Zipped shut, it is two layers of the same sateen. That is the feeling of something over the bed with almost no insulation. It is the layer for the night that starts warm and ends cool, and it goes in the wash with the sheets.

2layers of sateen in an empty duvet cover, and nothing else
300thread count, long-staple organic cotton, undyed

Organic cotton sheets

A woman makes the bed. The corner of the Circadian comforter hangs over the end, showing the cotton loop that ties into a duvet cover and our woven label in the side seam.

Wool is the summer duvet, because it keeps the air under it dry.

This is the part that surprises people. A duvet feels hot in summer because of what it does with moisture. Wool takes that moisture into the fiber, up to 30 percent of its own weight before the surface feels damp. The heat travels out with it, so the air under a wool duvet stays dry, and dry is what your skin reads as cool. It is why sheep wear it in August.

It suits the nights that call for a real duvet. In most of the country that means air conditioning, a cool stretch in June, or a bedroom that drops hard once the heating goes off. Our queen is about 9 pounds, hand-tufted so it stays spread, and the same duvet is the one we recommend for January. It is spot clean and sun only, so the organic cotton cover over it is the layer that gets washed.

30%of its own weight in moisture before the surface feels damp
1duvet for July and January, so the summer one is not a second purchase

The Organic Wool Duvet

Extreme macro of pre-polished USA-grown buckwheat hulls with air gaps between them

The pillow is the warmest place in the bed, so start there.

The face and neck give off more heat than any other part of the bed. A foam or polyester pillow has nowhere to put it. Buckwheat is thousands of hard hulls with a gap beside every one, and air keeps moving through those gaps all night, carrying your heat out. The surface runs several degrees cooler than foam and never builds the warm hollow you keep turning the pillow to escape.

When it is sweat rather than surface heat that wakes you, wool is the pillow. The Buckwool Hybrid puts a buckwheat chamber and a wool chamber back to back, so the night can change and the pillow can change with it. Every one of them opens at the side so you set the height, and all of them wear the same organic cotton pillowcase.

3 to 5degrees cooler at the surface than foam
2chambers in the Buckwool Hybrid, one buckwheat and one wool

Pillows for hot sleepers

What each summer layer does with the sweat.

Weight is the wrong thing to shop by. The right thing is what the fabric does with moisture.

Summer bedding layers compared, 2026.
Layer What it does with moisture How the night goes
Organic cotton flat sheet Absorbs it off your skin and lets it dry through the weave Cool and dry, and it washes weekly
Empty organic cotton duvet cover Two layers of the same cotton, no insulation between them Something over you, without the heat
Organic wool duvet Takes it into the fiber, up to 30% of its weight, and the heat leaves with it Dry under a real duvet, on the nights that call for one
Thin polyester summer duvet Cannot absorb it, so it sits in the air against you Clammy inside an hour despite the weight
Microfiber sheet Cannot absorb it either, however thin Feels cool in the packet and hot before the night is half over
Bamboo or eucalyptus lyocell Cool and slippery on contact, and the drape holds it close to the skin Good first hour, then it depends on what is underneath
Linen Absorbs well and breathes well Cool, and a coarser hand than sateen against bare skin

How hot is it, and what goes on the bed.

Read down to the night you are having.

Every layer here is the same undyed organic cotton sateen unless the row names wool.
The nightOver youUnder your headWhy
Hot and stillThe flat sheet on its ownBuckwheat PillowOne layer that passes air, and the coolest surface we make under your face
Hot, but you want weightThe duvet cover, emptyBuckwheat PillowTwo layers of sateen and nothing between them, so you get the weight without the insulation
Warm, with the air conditioning onThe Organic Wool DuvetBuckwool Hybrid PillowCold dry air outside the duvet, dry air under it, and a pillow with a side for each
The night that cools off laterThe flat sheet, with the wool duvet folded at the footBuckwool Hybrid PillowYou pull the duvet up over the sheet without getting out of bed

How warm is the room.

Hot, and you want almost nothing over you.

A cotton flat sheet. Ours is cut generously in 300 thread count organic sateen, and on the hottest nights it is the whole bed.

Organic Cotton Flat Sheet ›

Warm, and a sheet feels like too little.

The duvet cover with nothing inside it. Two layers of cotton sateen zipped shut give you weight without insulation, and it washes with the sheets.

Organic Cotton Duvet Cover ›

Air conditioned, or cool once the room drops.

The wool duvet. It keeps the air under it dry, so it is the one duvet that does not feel like a winter duvet in summer.

Organic Wool Duvet ›

The pillow is the hot part.

Buckwheat. Air moves between the hulls all night and carries your heat out. If you also sweat into it, the Buckwool Hybrid has wool on the other side.

Buckwheat Pillow ›

The four pieces of a summer bed.

SpecificationOrganic Cotton Flat SheetOrganic Cotton Duvet CoverOrganic Wool ComforterBuckwheat Pillow
MaterialCottonCottonWoolBuckwheat
Cover and weaveOrganic cotton sateenOrganic cotton sateenOrganic cotton sateenOrganic cotton twill
CertificationA GOTS Certified Organic flat sheet. License GOTS-10229, issued by Oregon Tilth. Undyed, in the cotton's own color.A GOTS Certified Organic duvet cover. License GOTS-10229, issued by Oregon Tilth. Undyed, in the cotton's own color.A GOTS Certified Organic duvet. License GOTS-10229, issued by Oregon Tilth. The wool comes from certified organic farms in New Zealand.Organic cotton twill cover. USA-grown buckwheat hulls, pre-polished and air-jet cleaned in a patented process that takes out the dust, then UV sterilized with no chemicals. Like most buckwheat hulls on the market, they carry no organic certification.
Temperature——Neutral-coolCool
Feel——FamiliarStructured
Adjustable——Not adjustableHighly adjustable
Expected lifespan——10 to 15 years with normal use and a duvet coverMost people get three to five years from a hull load; refresh the hulls with a replacement bag when the height and airflow drop
CareMachine wash cold on a gentle cycle and tumble dry low, or line dry. Fold it warm. Cotton sets its creases as it cools, so take it out of the dryer while there is still heat in it, give it one snap, and fold it then.Machine wash cold on a gentle cycle and tumble dry low, or line dry. Fold it warm. Cotton sets its creases as it cools, so take it out of the dryer while there is still heat in it, give it one snap, and fold it then.Spot clean and sun only. Never submerge, machine wash or dry clean.Pour the hulls into a dry bowl or bag first. Machine wash the cover cold on gentle and let it air dry. Sponge small marks with cool water. Keep the hulls dry, and give them an hour or two of sun to freshen them.
Where it is madeHandmade in New Jersey, USAHandmade in New Jersey, USAHandmade in New Jersey, USAHandmade in New Jersey, USA
Price from$129.00$209.00$449.00$89.00

Every cell in this table is read live from the product itself, so it cannot drift from the product page. A dash means we do not publish a figure for that piece.

The ones we hear most.

What is the best summer comforter?

A cotton flat sheet, and on the nights that is not enough, the duvet cover on its own with nothing inside it. Two layers of organic cotton sateen, zipped shut, with no insulation between them. Both wash weekly. When you want a real duvet, the wool one is the summer duvet, because it keeps the air under it dry.

Is there such a thing as a summer comforter?

Two of them, and neither is a thinner version of a winter one. The empty duvet cover is the lightest: two layers of organic cotton sateen zipped shut, with nothing between them. The wool comforter is the other, because it keeps the air under it dry even in August.

Do you make a lightweight summer duvet?

We make two duvets, cotton and wool, and neither is a thin summer weight. The one that belongs in summer is the wool, which stays dry under you because it takes the moisture your skin gives off into the fiber. For the hottest nights, the flat sheet and the empty duvet cover do the job better than any thin duvet, and they wash weekly.

Is a wool duvet too hot for summer?

It is the opposite of what people expect. A duvet feels hot in summer because the sweat has nowhere to go. Wool takes that moisture into the fiber, up to 30 percent of its own weight, so the air under it stays dry. Dry is what your skin reads as cool. It is the duvet for air conditioning and cool summer nights, and the same one for January.

Can I use a duvet cover without a duvet inside?

Yes, and it is one of the best summer layers there is. Ours is the same 300 thread count sateen on both faces, so zipped shut it is a two-layer cotton blanket with no insulation. Put it over the flat sheet on warm nights and take it off on hot ones.

Are sateen sheets too warm for summer?

Not in organic cotton at this weight. Sateen describes the weave rather than the fiber, and what it changes is drape and softness rather than warmth. What makes a sheet hot is a fiber that cannot absorb, and cotton absorbs. If you sleep hot, the layer that matters far more is what is inside your pillow and duvet.

What are the best sheets for hot sleepers?

A cotton that takes moisture off your skin, in a weave that lets it dry through. Ours are 300 thread count long-staple organic cotton sateen, undyed and without a finish, which matters because a resin or softening finish closes the weave. Polyester and microfiber feel cool in the packet and hold sweat against you before the night is half over.

What is the coolest pillow for summer?

Buckwheat, by feel. Air keeps moving between the loose hulls and carries your heat out, so the surface runs cooler than foam all night. If it is sweat rather than heat that wakes you, wool does more, and the Buckwool Hybrid puts both in one pillow so you can flip between them.

Should I switch duvets between summer and winter?

Most of our customers do not. The wool duvet works on moisture as well as warmth, so it is dry in July and warm in January. The summer bed gets lighter by taking layers off, not by swapping the duvet. If you want a second duvet, the cotton one is the heavier, more grounded option for winter.

How often should I wash summer bedding?

The layers against you, weekly. In summer that is the fitted sheet, the flat sheet, the pillowcase and the empty duvet cover if you are using it. Machine wash warm or cool, tumble low or hang, and skip fabric softener, which coats the fiber and stops it absorbing.

What if it still sleeps hot?

Send it back inside 60 nights, and free shipping applies. A hot room is still a hot room, and bedding can only stop adding to it. What it can do is stop the sweat collecting against you, which is the part of a hot night that wakes people.

The bed, in other people's houses.

Where the outside numbers come from

  • Wool is naturally breathable — the 35 percent figure, and the heat wool gives back as it absorbsThe Woolmark Company. Read .
  • The Global Organic Textile Standard — the standard itself. Certification covers every step of production through to the finished product, never a fibre on its own. Ask us for our certificate and we will send itGlobal Standard gGmbH. Read .
  • The six fills, comparedCircadian. Read .

Something over you, without the heat.

Cotton layers you can add and take away, and a wool duvet that stays dry in July. Handmade in our New Jersey workshop.

See the summer bed

The pillow people keep.

If you've sent more pillows back than you've kept, you're our customer.

4.7 out of 5
5★ 283
4★ 35
3★ 21
2★ 10
1★ 0
Read all 349 reviews

The three-star ones are in there too.

“I have owned more pillows than I have owned houses and I have owned 12 houses.”  This is by far the only pillow to use if you don’t want to wake up with sore shoulders or neck. I have replaced all the pillows in my house with this pillow.
Louise · Tree-Tapped Latex Pillow · August 2026 · Verified buyer
I have compressed discs in my neck, and I have spent hundreds of dollars over the past 6 months trying to find one that will help me sleep. Every pillow I bought caused me to wake up in even more pain than the night before!! The buckwheat pillow is life-changing!! I have slept through the night and wake up with no pain!!
Verified Patty Buckwheat Pillow · August 2026
I was leery to try another expensive pillow without some sort of trial period after being very let down by a different company's natural fiber pillow… I don't hear anything at all with the buckwheat! It does stay fresh and cool as well, but most importantly it actually holds my head/neck up and in place. Which allows me to actually get rest instead of always adjusting.
Verified Morgan Buckwheat Pillow · August 2026
I've been a buckwheat pillow customer for the last 7 years and I can say that Circadian has the highest standards of quality paired with incredible customer service. Very very impressed and would not hesitate to send anyone their way.
Verified Taylor Buckwheat Pillow · August 2026
I have spent years searching for a pillow that feels supportive and comfortable all night. I have finally found it. I absolutely love the Buckwool pillow. I removed a bit of the material to get it to exactly how I want it… I rarely wake up with neck pain now.
Verified Anonymous Buckwool Hybrid Pillow · August 2026
I find myself switching between the two and loving the feel of both. I haven't woken up with a sweaty head with either and that's an amazing feeling especially in the AZ summer. The buckwheat side is a lot quieter and more comfy/soft than others I've tried in the past.
Verified Ashley Buckwool Hybrid Pillow · August 2026
I have tried at least 10 different pillows in the last 3 years. Nothing has worked out except for this wool pillow. I have chronic neck pain which has been greatly reduced. I am very happy with my new pillow.
Verified Anonymous Organic Wool Pillow · August 2026
I have pretty bad chemical sensitivity (housebound most of the time)… I try to only buy totally safe, non-toxic products. I found this pillow to be very safe and non-toxic, and the packaging was fragrance free which is always a huge plus.
Verified Janie Wild-Harvested Kapok Pillow · August 2026
I ordered this pillow to replace my very old (but beloved) down pillow and I'm so glad I did. It is heavenly!… I advise you to heed the recommendation given by the quiz. I ordered cotton initially despite the quiz giving me kapok as a result… the quiz was right.
Verified Hannah Wild-Harvested Kapok Pillow · September 2026
The quality craftsmanship and materials is evident… when I asked if extra stuffing were available for the second one I'm using as a knee pillow, they not only pointed me to the right place on their site, but also created a new, smaller 1-lb. refill size based on my request.
Verified Stephanie Organic Wool Pillow · September 2026