The Slumber Cloud UltraCool Comforter takes the ClimaDry™ by Outlast and pairs it with an 89% cooling nylon and 11% spandex outer cover that mimics silk creating the silky smooth and soft to the touch hand feel.
Woman holding her coffee while wrapped in the Slumber Cloud UltraCool Comforter takes the ClimaDry™ by Outlast and pairs it with an 89% cooling nylon and 11% spandex outer cover that mimics silk creating the silky smooth and soft to the touch hand feel. | rollover
The Slumber Cloud UltraCool Comforter takes the ClimaDry™ by Outlast and pairs it with an 89% cooling nylon and 11% spandex outer cover that mimics silk creating the silky smooth and soft to the touch hand feel.
The All-season UltraCool Comforter folded in the Navy color
The All-season UltraCool Comforter folded in the sand color
Man and woman eating breakfast with the Slumber Cloud UltraCool Comforter takes the ClimaDry™ by Outlast and pairs it with an 89% cooling nylon and 11% spandex outer cover that mimics silk creating the silky smooth and soft to the touch hand feel.
UltraCool Comforter
UltraCool Comforter
Two woman and a dog on a bed with the Slumber Cloud UltraCool Comforter takes the ClimaDry™ by Outlast and pairs it with an 89% cooling nylon and 11% spandex outer cover that mimics silk creating the silky smooth and soft to the touch hand feel.
Detailed view of the piping on the Slumber Cloud UltraCool Comforter takes the ClimaDry™ by Outlast and pairs it with an 89% cooling nylon and 11% spandex outer cover that mimics silk creating the silky smooth and soft to the touch hand feel.
The Lightweight UltraCool Comforter folded and stacked in the Sand, white, and navy color
The Lightweight UltraCool Comforter folded in the white color
The Lightweight UltraCool Comforter folded in the navy color
The Lightweight UltraCool Comforter folded in the Sand color
UltraCool Comforter
UltraCool Comforter
Free Shipping & 60 Night Risk Free Trial

UltraCool Comforter

Reduces Night Sweats Up To 50% Perfect For Couples Machine Washable

Introducing the UltraCool Comforter for a cool, comfortable sleep. Featuring cooling nylon/spandex and NASA-engineered fiberfill for year-round comfort. Comes in two-weights: Lightweight for the hottest sleepers and All-Season for those who prefer a little more weight. 

Product Comparison
Select Color
White
Select Weight
Select Size
$279.00
Pairs well with..
A neatly folded Slumber Cloud Performance Sheet Set in white on a red background
From $204.00
Performance Sheet Set

- Luxuriously silky soft and stretchy cooling nylon cover fabric

- Hypoallergenic, patented ClimaDry™ by Outlast fiberfill provides a down-like feel while regulating heat and moisture as you sleep

- Corner loops keep it in place if used as an insert inside a duvet cover

- OEKO-TEX® STANDARD 100 Certified Technology. Certification Number: SH025 151577

- Two fill weights to choose from: Lightweight for hot sleepers or All-Season for those who want more loft and weight

- 155 gsm 89% Cooling Nylon 11% Spandex Jersey outer cover

- 50% Outlast® ClimaDry polyester fiberfill / 50% polyester fiberfill

- 300 gsm fill weight for the All-Season option / 150 gsm for the Lightweight option

- 12" framed quilt boxing

Twin / Twin XL - 76" x 86"
Full / Queen - 90" x 98"
King / Cal-King - 108" x 98"

*For Cal-King mattresses simply rotate the comforter 90º

Basic Care:
Machine wash cold water on a gentle cycle with a mild detergent and with like colors only. Do not use fabric softener. Only use non-chlorine bleach when needed. Tumble dry low heat until completely dry. Remove from dryer immediately. Do not dry clean. Do not iron.

Pro Tip:
Wash this every 1-3 months. Reduce wrinkles by removing this from the dryer immediately.

All U.S. orders are shipped right to your door, free of charge.

Sleep on it, wash it, and really put it to the test for 60 nights! If you don’t love your new bedding, just return it for a full refund. No questions asked!

*Final Sale items and colors are not eligible for return, exchange, or the 60 Night Trial Period.

UltraCool Comforter
From $279.00

Why You'll Love It:

A cooling comforter that can be used all year long.

NASA-Engineered Comfort

The patented ClimaDry™ by Outlast fiberfill proactively regulates heat and moisture by absorbing, storing, and releasing heat.

Lab Proven Results

One of the highest Qmax values on the market (higher Qmax values = higher coolness feeling) - better than cotton, bamboo, silk, and lyocell.

Silky Soft Comfort

Featuring an 89% cooling nylon and 11% spandex outer cover, the UltraCool Comforter mimics the feeling of silk.

Slumber Cloud Comforter Comparisons

Different solutions all designed with temperature regulation:
UltraCool Comforter

Cool to the touch. Silky. 3 Colorways.

Performance Cotton

Breathable. Durable cotton. Classic. Ideal as duvet insert
Textured Blanket

Textured. Lightweight.
Detailed view of the piping on the Slumber Cloud UltraCool Comforter takes the ClimaDry™ by Outlast and pairs it with an 89% cooling nylon and 11% spandex outer cover that mimics silk creating the silky smooth and soft to the touch hand feel.
A detailed view of the corner tie on a Slumber Cloud Comforter.
Detailed view of the corner loops on the Slumber Cloud Textured Blanket in pewter made with Outlast Temperature Regulation Technology

Comforter Fill Weights

The low down on our down alternative fill weights

Lightweight

More of a thin blanket weight, the Lightweight fill weight is ideal for hot sleepers, those who prefer less loft on top of them, or for layering.

All Season

More of a classic comforter weight, the All Season fill weight is ideal for those who want more loft and weight or live in colder climates

A better night’s sleep because of science.

It’s a fabric designed for NASA spacesuits up where temperatures change by 500 degrees. We think it can handle your bedroom. Learn More

The Only NASA Bedding

Our bedding utilizes Outlast®, the world’s only textile technology to have received the Certified Space Technology™ quality mark by the renowned Space Foundation.

Reduces Sweat By 50%

Our bedding provides proactive heat and moisture management, clinically proven to reduce night sweats by up to 50%. *Outlast Humidity Sleep Study

Improves Deep Sleep By 20%

Our bedding adapts to the ideal temperature of both hot and cold sleepers, proven to decrease tossing & turning and increase sleep efficiency by 20%.*Outlast Heat Sleep Study

Us vs Them

Slumber Cloud Cooling Bedding
Other "Cooling" Bamboo Products (like Buffy & Sleep Number)
Traditional Bedding (like Parachute & Brooklinen)
Proactive Temperature Regulation ?
Yes
No
No
Manages Temperature Fluctuations ?
Yes
Yes
No
Ideal for Thermally Incompatible Couples ?
Yes
No
No
Moisture Wicking Capabilities ?
Yes
Yes
No
Breathability ?
Yes
Yes
No

"We replaced our down comforter with this and could not be happier. Really nice quality and keeps us nice an toasty without extra layers or being too heavy."

- Tina W.

"Love the fabric and really does feel cool to touch at night!"

- Lauren T.

"When I say this is probably the softest, most buttery comforter i’ve ever touched in my life, I am not exaggerating. It’s so cool to the touch, feels like the plushiest “Squishmallow-y” material, and regulates body temperature even with a duvet cover on. I would buy this 100 times again."

- Ariana N.

FAQs

The UltraCool Comforter uses a premium outer cover fabric meaning pairing the UltraCool Comforter with a duvet cover is not necessary for temperature-regulation performance.

If you would prefer to use a duvet cover with the UltraCool Comforter it will regulate your temperature even when placed inside a duvet cover.

Definitely! When you sleep hot but your partner sleeps cold we refer to this as being “thermally incompatible”. Our bedding is designed to automatically adjust to each sleeper’s ideal sleep temperature. With the unique ability to react to each sleeper's temperature independently, our bedding ensures that both you and your partner will sleep comfortably all night long.

Although all three comforter options are designed to help you sleep cooler and more comfortable, it's important to choose the version that best suits your sleeping needs. Below is a quick overview of each option to help you in this decision making:

UltraCool Comforter: A more traditional weight, the UltraCool Comforter pairs Outlast® temperature-regulation fiberfill with silky smooth outer fabric that is made of cooling nylon and spandex. The UltraCool Comforter is designed with 300 gsm fill weight – that of a traditional 3-season comforter but without the traditional heat build up. This comforter is the ideal choice for year-round use.

Lightweight Comforter: Our most popular comforter, the Lightweight Comforter uses Outlast® temperature-regulation fiberfill to regulate heat and humidity build up. Our thinnest option, this is best suited for "hot" sleepers who still want a little bit of weight on top of them.

Comforter: A twist on a classic comforter, this 3-season Comforter uses Outlast® temperature-regulation fiberfill to regulate heat and humidity build up. With a higher fillweight than the Lightweight Comforter the Comforter is ideal for those who need more of a 3-season weight or who prefer a bit more loft.

Yes, the UltraCool Comforter comes with cover loops.