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Nacreous Pillow Cover

Pronounced [ney-kre-uhs]
The Nacreous Pillow Covers are like mini spacesuits for your pillows. Designed to zip over your pillows, they automatically adapt to temperature changes to maintain cool comfort throughout the night. These state-of-the-art pillow covers incorporate layer upon layer of proprietary Outlast® temperature regulating fabric so you are always sleeping on the cool side.
  • Each pack includes 2 pillow covers
  • Gold+ Comfort Rating, the highest comfort rating available
  • 300 thread count - 40% NASA-inspired Outlast® viscose / 60% cotton top cover for peak breathability and temperature regulation
  • Proprietary Outlast® lining fabric for maximum heat management and added comfort
  • Designed to work even when used underneath your pillowcase
  • Zippered enclosure transforms your existing pillows into performance "cooling" pillows
  • Hypoallergenic and easy-care – just throw them in the washing machine

Pillow Covers

Standard
21” x 29”
Queen
21” x 31”
King
21” x 37”

Pillows

Standard
20” x 26”
Queen
20” x 30”
King
20” x 36”
From $69.00

Same as $0.19 a night for 365 nights


Free shipping

60 Night Trial

Outlast Technology
Gold+

Cool By Design

Upgrade the comfort of your pillows with NASA engineered cooling technology. Dual layers of Outlast® technology means the Nacreous Pillow Covers will help even the hottest of sleepers stay cool and comfortable all night long. It all starts with a heavily coated Outlast® lining fabric on both sides to reduce heat buildup. For maximum cooling performance we then integrated an extra loading of Outlast® technology into the top cover for the greatest heat absorption.

With two layers of Outlast® fabric, these cooling pillow covers will help keep your head at the perfect temperature all night while complementing the other layers of your Slumber Cloud sleep system.

Out of this world comfort

Truly born from space, Slumber Cloud bedding is infused with the same temperature regulating technology NASA astronauts used in their spacesuits. This patented technology, called Outlast® technology, is made up of thousands of microscopic “beads” called Thermocules™. Each individual bead is set to a specific temperature to counter any temperature fluctuations you might experience during the night. As your temperature increases, the beads absorb and store any excess heat away from your body to keep you cool. If your temperature drops, the beads release the stored heat back to you to keep you at the perfect temperature. The end result is a better night’s sleep with bedding that helps you sleep more comfortably, sweat less, and wake up feeling refreshed.

Outlast Space certified

WHY WE USE OUTLAST® TECHNOLOGY

Cools Hot Sleepers

It’s just plain frustrating to keep waking up night after night, soaked with sweat and unable to get back to sleep. Many people of all ages and body types suffer from night sweats. Outlast® technology keeps you at the most comfortable temperature throughout the night… so you sleep cooler and more comfortably.

Helps With Hot Beds

Love your bed, but not all the heat buildup? Although they can reduce pressure points, beds with memory foam often get uncomfortably hot. Outlast® technology helps prevent the heat from your mattress from building up. You'll still enjoy the comfort of your mattress but without that hot, sweaty feeling.

Controls Humidity

When humidity develops in your bedding, your body sweats raising the humidity even higher. This causes you to wake up and push the covers off to "release" the humidity. Later you wake up again, this time too cold without the covers. Outlast® technology mitigates heat and humidity so there's no more pushing and pulling at the covers.

Easy As One, Two, Zzz

A zip is all it takes to turn your pillows into heat fighting superheroes. Suited for use with the Cirrus Pillow or your existing pillow and pillowcases, these ultra easy to use pillow covers offer enhanced breathability and advanced thermoregulation to keep you from waking up hot, sweaty and uncomfortable.

Thoughtful Details

It doesn’t stop at the dual layers of temperature regulating technology. It’s the little things that make the Nacreous Pillow Covers the perfect spot to rest your head.

Stays in place

Easy Use

Just like traditional bedding, you can use a pillowcase without losing the proactive temperature regulating abilities.

Breathable

Breathable

Soft to the touch, the durable 300 thread count, 40% Outlast® viscose / 60% cotton cover allows your pillow to breathe and helps the heat escape.

Easy care

Easy Care

Machine washable, these hypoallergenic covers extend the lifespan of your pillows by keeping allergens and dust mites out.

Frequently Asked Questions

Free shipping on all orders

Don't pay for shipping! All U.S. orders are shipped right to your door free of charge.

Try it risk free for 60 nights

Sleep on it, wash it, and really put it to the test. If you don't LOVE your new bedding, simply return it for a full refund. No questions asked!

Build the bed of your dreams

Pick and choose each layer of your bed with the Slumber Cloud Bundle for a truly custom "sleep system" designed with space age temperature regulating technology for an unmatched sleeping experience. Plus you'll save 10% versus buying separately when you bundle $400 or more of products together.

Mattress Pad

From $129.00

Stratus Sheet Set

From $139.00

Cumulus Comforter

From $139.00

Cirrus Pillow

From $49.00 Regular Price $49.00
Mattress Pad

Mattress Pad

From $129.00
The core piece of bedding to sleep at the perfect temperature without that hot, sweaty feeling. If you need the most temperature regulation, the mattress pad is right for you. If you need 100% waterproof protection that stays cool, choose the protector.
Stratus Sheet Set

Stratus Sheet Set

From $139.00
More than thread count, we made our sheets with threads that count. Soft, cool, and perfectly weighted, these sheets are the ideal blend between the softness and durability of cotton and the unique temperature regulation of Outlast® fibers to help you get the most comfortable night's sleep possible.
Cumulus Comforter

Cumulus Comforter

From $139.00
Born from space, this comforter automatically absorbs, stores, and releases heat as the temperature under your covers changes. It fights off the one thing that makes you sweat at night - humidity. You can finally stop pushing and pulling the covers on and off all night trying to find the perfect temperature.
Cirrus Pillow

Cirrus Pillow

From $49.00 Regular Price $49.00
With NASA-inspired technology built right into the Cirrus Pillow, there's no more flipping to the "cool side". A cooling fabric shell infused with patented Outlast® technology combats heat while your choice of luxury core fibers provide the perfect amount of support for any sleeping position.

You're just $400 away from saving 10%

$0.00

Pay at your own pace with Klarna Credit. If paid in full within 6 months, no interest will be charged. Interest will be charged at 19.99% if the purchase balance is not paid in full by the end of the promotional period. Subject to credit terms. Learn More Pay For Orders $299+ Over 6 Months Interest Free

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60 Night Trial

In the press

A favourite among our consumer testers, who said they wanted to keep it for themselves