Flannel Sheet Set - Final Sale
Like your favorite flannel shirt, these brushed flannel sheets are perfect for staying warm and cozy in winter, while the Outlast® temperature-regulating viscose blend means you won't wake up in a puddle of sweat. A bit denser, and softer against the skin than our Essential Sheets.
Please note that items listed as Final Sale are not eligible for return, exchange, or the 60 night trial period.
Click here to see how this product compares to our other sheets and duvet covers.
Fitted |
Flat |
Pillowcases |
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Twin | 39" x 75 x 12" | Twin | 66" x 96" | Twin | (1) 20" x 30" |
Twin XL | 39" x 80" x 12" | Twin XL | 66" x 102" | Twin XL | (1) 20" x 30" |
Full | 54" x 75" x 15" | Full | 83" x 92" | Full | (2) 20" x 30" |
Queen | 60" x 80" x 15" | Queen | 92" x 102" | Queen | (2) 20" x 30" |
King | 78" x 80" x 15" | King | 108" x 102" | King | (2) 20" x 40" |
Cal-King | 72" x 84" x 15" | Cal-King | 108" x 102" | Cal-King | (2) 20" x 40" |
Split-King | (2) 39" x 80" x 15 | Split-King | 108" x 102" | Split-King | (2) 20" x 40" |
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.
How Do They Compare?
Flannel Sheet Set - Final Sale
Additional details.
A modern twist on your classic flannel sheets. A blend of NASA-approved Outlast® viscose and premium cotton fibers with a super soft, cozy brushed flannel finish provide an incredible hand feel. Space-age temperature-regulation you can wrap yourself up in, without waking up in a hot and sweaty mess.
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Brushed flannel finish for a premium hand feel
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Patented Outlast® fibers and premium cotton give the ideal balance of comfort and temperature-regulation
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Includes One Flat Sheet, One Fitted Sheet, and Two Pillowcases (Twin and Twin XL include one pillowcase)
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300 thread count - 40% NASA-approved Outlast® viscose / 60% cotton top cover for peak breathability and temperature-regulation
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Oeko-Tex Standard 100 Certified Technology
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
- Flannel Sheet Set - Final Sale
- Essential Sheet Set
- Performance Sheet Set
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”.

More than thread count, NASA-approved Outlast® fibers adapt to fluctuations in your temperature for an innovative approach to maximum sleeping comfort.

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 our products the best available.

Single-Ply Construction
Single-ply construction means you can rest easy knowing you are sleeping on the highest quality fibers

Full Elastic Band
Full elastic band keeps the fitted sheet from shifting

Easy to Care For
Just throw it in your home washing machine
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.
Our sheet sets come with 1 fitted sheet, 1 flat sheet, and pillowcases.
Twin and Twin XL sets come with 1 standard-size pillowcase.
Full and Queen sets come with 2 standard-size pillowcases.
King and Cal-King sets come with 2 king-size pillowcases.
Split-King sets come with 1 king-size flat sheet, 2 twin xl fitted sheets, and 2 king-size pillowcases.
Although all three sheet 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:
Essential Sheet Set:
- The blend of cotton and Outlast® temperature-regulation viscose fibers offers a traditional super soft cotton feel. Ideal for those who prefer a more classic sheet but want temperature-regulation performance.
Performance Sheet Set:
- The blend of premium Tencel® and Outlast® temperature-regulation viscose fibers offers a buttery, silky performance feel. Ideal for those who prefer silky smooth softness with the most temperature-regulation performance.
Flannel Sheet Set:
- The blend of brushed cotton and Outlast® temperature-regulation viscose fibers offers a heavier super soft brushed flannel hand feel. Ideal for those who want a thicker, warmer sheet with temperature-regulation performance.
Currently, our sheets are only sold in sets which include the flat sheet, fitted sheet, and pillowcase. However, additional pillowcases are available for purchase.
Our fitted sheets come with 15" pockets. Fitted sheets are designed with an elastic strap to secure tightly on mattresses with varying depths from 5'' to 18''
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 sheet set, 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 sheets, please dry it on low heat or air dry. Do not iron your sheets. To reduce wrinkling, take your sheets 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.
