UltraCool Comforter
With an outer fabric made of cooling nylon and spandex you get a softer than silk hand feel that actively cools. Inside is NASA grade temperature regulation fiberfill, which automatically adjusts to fluctuations in temperatures. At the weight of a traditional comforter, something uncommon in a “cooling” comforter, the advanced cooling fibers keep you and your partner at the perfect temperature all night and all year long.
UltraCool Comforter |
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| Twin/Twin XL | 76" x 86" |
| Full / Queen | 90" x 98" |
| King / Cal-King | 108" x 98" |
Ground shipping and returns are FREE for all US orders. Shipping typically takes 3-7 business days for most in-stock merchandise. Canada and express shipments are available for an additional fee at checkout.
For your peace of mind, all our products come with a 60 night satisfaction guarantee, as well as a 180 night warranty. If you don't love your new bedding, simply send it back for a full purchase price refund. No questions asked! FYI we do our very best to donate returns to charity.
Utilize Shop Pay Installments or PayPal Credit during checkout as flexible payment plans to split your purchase amount into equal and interest-free payments.
Save 10% when you spend $400+
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How Do They Compare?
UltraCool Comforter
Additional details.
The UltraCool Comforter takes the ClimaDry™ by Outlast fiberfill raved about in our other blankets 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 handfeel.
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Hypoallergenic, patented ClimaDry™ by Outlast fiberfill provides a down-like feel while regulating heat and moisture as you sleep
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155 gsm 89% Cooling Nylon 11% Spandex Jersey outer cover for additional temperature-regulation
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Oeko-Tex Standard 100 Certified Technology
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300 gsm fill weight is the weight of a traditional 3 season comforter but without the traditional heat buildup
How warm or cool is this?
Use the temperature guide to balance your bed just the way you like. Or compare other product features here.
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Traditional Bedding
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Bamboo & Eucalyptus Bedding
- Weighted Blanket - Final Sale
- Comforter
- Textured Blanket
- Lightweight Comforter
- Performance Comforter
- UltraCool Comforter
Why we're different.
Traditional bedding and moisture wicking technologies react to changes in your body temperature while you sleep. Slumber Cloud is doing something different.
Slumber Cloud Bedding utilizes Outlast® technology for a unmatched approach to temperature regulation. Outlast® technology is proactive, not reactive. As your body temperature increases during sleep, Outlast® technology stores that heat to keep you cool, and then releases it as you cool down...keeping you feeling “just right”.
The cooling nylon and spandex outer cover provides a softer than silk hand feel that actively cools. In fact, third party lab tests show this has on of the highest Qmax values on the market (the higher the Qmax value the bigger the coolness feeling) - better than cotton, bamboo, silk, and lyocell.
Inside the ClimaDry™ down alternative fiberfill improves the microclimate of your bed to reduce heat and humidity build up for a more comfortable night’s sleep.
Outlast® materials improve comfort for:
Anyone looking for a more comfortable night’s sleep - they’ll sleep cooler!
Women experiencing menopause - hot flashes and resulting night sweats are reduced so they sleep cooler and drier.
Thermally incompatible couples - individuals sleep at their own ideal temperature
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We pass on everything we learn to our customers. From sleep studies to new technologies, we want to help you make informed decisions about your sleep.
Click to learn more about our studies:
Heat Sleep Study
Humidity Sleep Study
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The thoughtfulness is in the details.
It doesn’t stop at thread count. It’s the little things, the thoughtful details, that make the UltraCool Comforter the best on the market.
12’’ Quilt Boxing
A framed 12’’ diamond quilt boxing keeps the fill from shifting while adding a polished look
Lab Proven Cooling
Lab tests show this has one of the highest Qmax values on the market (the higher the Qmax value the bigger the coolness feeling) - better than cotton, bamboo, silk, and lyocell
Easy to Care For
Just throw it in your home washing machine and drier when it is still to freshen up your comforter
Most frequently asked questions.
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.
Outlast® technology is made of a unique material that can absorb, store and release excess heat. As an individual’s skin temperature increases, the technology will absorb that excess heat to help reduce overheating. The material will store the excess heat until the skin temperature begins to drop. When this occurs, the stored heat is released back to the individual to prevent chill.
By managing the build-up of heat and moisture under the covers, Outlast® technology helps keep you at a comfortable temperature so you sleep “just right.”
Slumber Cloud products are designed to help manage heat and humidity build up. It is not an air conditioner with a set temperature degree, but it will react to your temperature all night long to reduce heat build up and manage temperature swings.
Slumber Cloud takes a proactive approach to temperature control by absorbing and storing excess heat when temperatures are too warm and releasing heat when temperatures are too cold. This approach is different than most other "cooling" bedding technologies/products on the market that are moisture-wicking (ex. Bamboo & Eucalyptus).
Moisture-wicking is a reactive approach because it doesn't start to cool you down until you build up sweat and moisture and then wicks it off of you. Our products are designed to prevent you from ever getting to the point of sweating and building up moisture.
A comforter tends to be a bit heavier in weight than a blanket and although they often are used in a single layer, they can be used inside a duvet cover for a more finished look. Similar to a comforter, a duvet is type of blanket that is generally lighter in weight and is used inside a duvet cover making it easy to care for.
Our comforters are designed to regulate your temperature even when placed inside a duvet cover. Feel free to use a duvet cover to get the finished look you are after as it will not have a drastic impact on the overall performance. However, we do recommend the Essential Duvet Cover for an added layer of Outlast® temperature-regulation and breathability.
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:
Performance Comforter:
- A more traditional comforter in it's amount of loft. The Performance Comforter pairs Outlast® temperature-regulation fiberfill with a silky smooth Tencel®, a moisture wicking based outer cover. This combination of two technologies is best for sleepers who want a more lofty comforter that still sleeps cool.
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.
Down Comforter:
- A new twist on a classic comforter, this all-season Down Comforter uses premium down filling that "hugs" your body to sleep while our most advanced Outlast® temperature-regulation liner fabric provides the most amount of technology in any of our comforters for the best temperature performance.
The difference between the two comforter weights is the amount of filling. The lightweight option is significantly lighter & thinner at about 1/4th'' thick, and is the best option for hot sleepers.
The comforter is more of a three season weight, and for those who prefer a bit more loft & thickness at about 2''. Both of the comforters are filled with Outlast technology to assist with keeping you cool with proactive heat management.
The UltraCool Comforter uses a premium outer cover fabric meaning pairing the Ultra Cool Comforter with a duvet cover is not necessary for temperature-regulation performance
At this time our comforters only come in the white color that is displayed. We do carry our Essential Duvet Cover in a few different color options that can be used in conjunction with our comforters.
Yes! Just like traditional bedding, Slumber Cloud products are designed to be washed and dried in your home washer and dryer. Please carefully follow the care instructions on the tag of your products.
The technology in our bedding is sensitive to high heats - instead of ironing we recommend using a wrinkle release spray such as Iron In a Bottle for that crisp and finished look.
Please refrain from using harsh chemicals such as bleach and oxiclean on your bedding. Instead opt for more natural alternatives such as a small amount of dish soap, a warm water & vinegar solution, or specialty formulated laundry detergent such as Dropps
To wash your comforter, please follow the washing instructions on the tag. If you have cut your tags after purchase, then it is recommended to wash with Slumber Cloud Free & Clear Laundry Detergent or a mild detergent in cold water on a delicate spin cycle.
When it’s time to dry your comforter, please dry it on low heat or air dry. Do not iron your comforter. To reduce wrinkling, take your comforter out of the dryer and immediately place on your bed or use a wrinkle release spray such as Iron In a Bottle for that crisp and finished look.
Free shipping is only valid for US and Armed Forces delivery addresses. However, we do offer discounted shipping rates to Canada addresses.
Currently, we only ship internationally to Canada. At the time of purchase we include the cost of shipping, taxes, and duties for Canadian shipments. No additional fees will incur at delivery, but if they do please contact our customer service team at info@slumbercloud.com to take care of the issue.
For all other countries, If you find a forwarder or have a friend or family member here in the states, we would be more than happy to work with you to get it there.
We accept returns in any condition within 60 days of purchase! We want you to absolutely love your new bedding, so if you wash an item, try it out, and decide it's just not for you, we can definitely still initiate a return.
Please note we do our very best to donate all returns to local charities instead of a landfill. We appreciate your help in this process by washing any used items before returning them to us.
All shipping fees for domestic returns are completely free! When you initiate a return through our returns platform, you will receive a prepaid shipping label to get the item back to us.
If you live outside the US and are looking to initiate a return, please check out the return policy in the International FAQs.
If you're looking to initiate a return, just head over to our returns page!
Please note that we are not able to process returns for items listed as Final Sale or past the 60 day return period.
All products sold on the Slumber Cloud website come with a 60-Day Satisfaction Guarantee. Sleep on it, wash it, and really test it out - If you are not fully satisfied with your new bedding you can return the item(s) within 60 days of your purchase date, no questions asked. An refund will be issued, within 7 business days of receiving the returned product.
Yes! All of our products are covered not only by the 60 night trial period but also a 180 day warranty which covers manufacturers defects (i.e. stitching, sizing).
Please note in addition to damage caused by disregard of care instructions, temperature performance is not considered a manufacturers defect or covered by the product warranty.
Verified Reviews
Free Shipping & Returns
All U.S. orders are shipped right to your door, free of charge.
Try it For 60 Nights
Sleep on it, wash it, and really put it to the test for two whole months! If you don’t love your new bedding, just return it for a full refund. No questions asked!
A favourite among our consumer testers, who said they wanted to keep it for themselves.
