• The Brume Pillowcase Set — AirLace muslin, set of two
  • The cool side, doubled — key benefits
  • Why muslin at the pillow
  • Nine solids plus prints
  • Muslin pillowcases dressed on the bed
  • Muslin vs satin and poly
  • Care — it improves with use
  • The fit — 50 by 90 cm
  • The 100-Night Cool Guarantee
  • The airy open weave up close — detail
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FOR HOT SLEEPERS · OEKO-TEX® CERTIFIED COTTON
Claire ‎ and 10,000+ other sleepers

The Brume Pillowcase Set

The Brume Pillowcase Set
$58.95 $29.95 AIRLACE™ MUSLIN · SET OF 2
Set of two, 50×90 cm
Breathes at the warmest point
Softer with every wash
Oeko-Tex® certified cotton
Color: Dune
Limited Edition
Size: 20x35 in
+ FREE Tracked US Shipping
+ 100-Night Cool Guarantee included
Ships within 24 hours
Free US shipping
The 100-Night Cool Guarantee

Sleep on them for up to 100 nights. If your pillow isn't noticeably cooler than before, send them back — even washed and slept-on — for a full refund. No restocking fee. No interrogation.

Will the texture feel rough on my face?

It arrives soft with a gentle crinkle and gets noticeably softer with every wash — fully broken in around wash ten. The crinkle is what creates the air pockets that keep your face cool.

What exactly is muslin?

Muslin is a loose, open-weave cotton — the fabric baby swaddles are made of, because nothing soft breathes better. On a pillowcase that means heat from your face drains through instead of building up.

What pillows do they fit?

50 × 90 cm (20 × 35 in) — fits standard and queen pillows. Sold as a set of two, one for each side of the bed.

How do I wash them?

Machine wash cold with your regular linens, hang dry or tumble low. They get softer with every wash — this is the rare bedding you should wash often.

What if it doesn't work for me?

You have 100 nights. If your pillow isn't cooler, email us and send them back — washed, used — for a full refund. No restocking fee.

View full details
Every layer breathes
100-Night Cool Guarantee
Oeko-Tex® certified cotton
Free tracked US shipping
Heat pools at the pillow. Not this one.
WHY MUSLIN, HERE

Heat pools at the pillow. Not this one.

Your face is the warmest point of contact on the bed, and most pillowcases bounce that heat straight back. Open-weave muslin gives it somewhere to go.

AirLace™ open weave
Air paths run through the gauze — heat from your face drains through instead of building up.
The cool side, always
The 3am pillow-flip retires. Both sides stay on the cool side.
Softer every wash
Crinkled gauze that breaks in like a favorite tee — fully broken in around wash ten.
Oeko-Tex® certified
100% long-staple cotton, tested free of harmful substances. Gentle on reactive skin.
HOW IT'S MADE

Woven slow, on purpose.

The same nine-layer muslin as the Brume Blanket, cut for the place your skin spends the most time. Made slowly, washed into softness, and finished with nothing you'd need to wash off.

It starts as cotton
No. 01

It starts as cotton

Long-staple cotton, spun into a fine, soft yarn. No polyester, no blends — a natural fiber the earth knows how to take back.
Nine layers, woven as one
No. 02

Nine layers, woven as one

The open gauze is woven layer over layer — nine of them — so air can travel through the finished cloth. Hold it to the light and the breathing room is visible.
Washed, never coated
No. 03

Washed, never coated

Every piece is pre-washed so the layers relax into their signature crinkle. No chemical softeners, no finish to wash off — just water doing the work. That's why it keeps getting softer.
Checked by hand
No. 04

Checked by hand

Folded and inspected before it ships — and tested to the Oeko-Tex® standard, free of substances you wouldn't want against your skin. Slow to make. Made to stay.
100% long-staple cotton
Oeko-Tex® tested, free of harmful substances
No polyester, no fleece — anywhere
A natural, biodegradable fiber
HOW TO USE THEM

Three ways to run it.

Summer
Muslin cases on both pillows. The warmest point of the bed becomes the coolest.
With the Brume
Match the blanket, or contrast it — same fabric, same breathability, one system.
Wash day
Wash often. Unlike everything else you own, they come back softer.
Three ways to run it.
THE STANDARD

Built to a number.

2
pillowcases per set
both sides of the bed
100%
long-staple cotton
no polyester, no satin coating
50×90
centimeters
fits standard & queen pillows
100
nights to decide
full refund if it doesn't sleep cooler
THE HONEST COMPARISON

Muslin vs. the cases you have now.

Ondine Muslin Satin & poly
Air moves through the weave
No clammy 3am pillow-flip
Softer with every wash
No static, no pilling
Oeko-Tex® certified natural fiber
Feels smooth out of the bag
FROM THE FIRST 100 NIGHTS

What pillow-flippers say.

Placeholder reviews — swapped for verified customer reviews at launch.

“I stopped flipping the pillow.”

That's the whole review. Twenty years of hunting the cool side, over.

Hélène R. Verified Dune

“My skin likes them better too.”

No satin slickness, no polyester static. Just soft cotton that doesn't stick to my face in summer.

Maya S. Verified White

“Bought a second set immediately.”

One set in the wash, one on the bed. They really do get softer every wash — wash five is a different fabric.

Laura B. Verified Grey

“The crinkle look is a choice.”

I love the relaxed look; my mother thinks the bed looks unironed. Know your aesthetic. Sleeps wonderfully cool either way.

Ines V. Verified Green
IN REAL HOMES

The cool side, in real homes.

The weave, up closeThe weave, up close
Both sides coveredBoth sides covered
The setThe set

It arrives soft with a gentle crinkle and gets softer with every wash — fully broken in around wash ten. The texture is what creates the air pockets.

50 × 90 cm (20 × 35 in) — fits standard and queen pillows. Sold as a set of two, one for each side of the bed.

Machine wash cold with your regular linens, hang dry or tumble low. They come back softer every time.

Same muslin, same dye lots on the core solids — Dune, White, Grey, Green, Blue, Pink and more. Match the blanket or contrast it.

You have 100 nights. If your pillow isn't cooler, email us and send them back — washed, used — for a full refund. No restocking fee, no store credit games.

The cool side, doubled.

The cool side, doubled.

  • Breathes all night
    Open weave lets heat out before it wakes you
  • 100 nights to decide
    Full refund if it doesn't sleep cooler
  • Ships in 24 hours
    Free tracked US shipping, 2–5 days
try it for 100 nights
100-Night Cool Guarantee · Free US shipping · Oeko-Tex® certified