Sleep Cooler All Night Long

Back Science™ Kool-Flow™ Cotton Sheet Set

$74.99 - $129.99



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Breathable High-Quality Sheets

High-quality cotton & bamboo sheet sets that will keep your mattress cooler without the cheap, pasty, china-made feel. Many luxurious sheets use a higher thread-count that cuts off the breathability of your mattress and causes it to sleep hot throughout the night. As all mattresses, no matter what cooling technology is used, rely on breathability to carry your body heat out of the mattress, breathable sheets are needed to solve this problem. Our sheets are made with low thread-count, but high-quality materials to give an ultra-luxury feel without the need for hot sleep, keeping you happier and cooler all night long. Many of our customers love the feel of our bamboo sheets as they provide a stretchier, more conforming feel that works especially well with not only the Back Science™ Bed, but other gel-type, memory foam, latex, and pillow-top mattresses as well. For our customers who like the feel of cotton or prefer a pure white rather than the natural bamboo color, we offer our Kool-Flow™ cotton sheets, which come in a variety of colors.

Kool-Flow™ Breathable Cotton Sheets

The Back Science™ Kool-Flow™ cotton sheet set uses a high-quality, breathable cotton material to offer a classic high-end cotton sheet feel without heating up your mattress. High thread-count cotton or silk sheets feel great but cut off breathability and sleep hot. Our sheet set uses only high-quality materials in a lower, 400 thread-count to offer a more luxurious feel without sacrificing breathability, keeping you cooler all night long. Each sheet set comes with 1 fitted sheet, 1 flat sheet, and 2 pillows cases (split king / cal-king sets come with 2 total of the fitted and flat sheets, 1 per each side).

Kool-Flow™ Bamboo Stertch-Knit Sheets

The Back Science™ Kool-Flow™ Bamboo sheet set uses a breathable, stretch-knit bamboo material to give you contouring comfort that won't make your mattress heat up. Unlike high thread-count cotton or silk sheets that heat up your mattress throughout the night, our sheets are made to be breathable to keep you cooler while you sleep. Using high quality USA materials, our bamboo sheets stretch to allow the mattress to properly adapt and contour to the bumps and curves of your body, as opposed to many traditional styles which can interfere with your gel-type, memory foam, latex, or hybrid mattress. Each sheet set comes with 1 fitted sheet, 1 flat sheet, and 2 pillows cases.

Frequently Asked Questions

Answers to some of the frequently asked questions are customers have about the Back Science™ Bed and the technological innovations we utilize. Have a question not on this page? Feel free to send us an email to or give us a call at (800) 667-1969 to speak with a sleep expert who can personally assist you in finding the perfect fit and answer any questions you have about our products and services.

Top Reviews

Ian F, January 23, 2024

5 out of five star rating on Trustpilot

Update: After 2 months my wife's back pain at night is gone! Thank you Dr. Rick and the incredible team at Ultrabed for your recommendations and expertise in finding us a great Back Science mattress!

Back Science Review Image of Customer in Showroom

My wife and I just visited the Ultrabed showroom in Agoura Hills, CA. What a great experience! Dr. Rick (the owner) and Jordan (salesperson), were patient, helpful, and no-pressure. They listened to our concerns regarding my wife's back pain with our current mattress, and as a chiropractor Dr. Rick was able to recommend various brands of mattresses and explain their design attributes, heat conduction characteristics, and features. Ultimately we settled on a custom Back Science mattress which is Rick's patented and proprietary mattress. We are looking forward to taking delivery in a few weeks and getting more restful nights of sleep.

The showroom is conveniently located off the 101 freeway, with ample parking, gentle music, a water feature, soft lighting, and a clean aesthetic. It's obvious this company cares about their customer experience and stands by their products. Highly recommend!

Lauren Dedow, February 16, 2024

5 out of five star rating on Trustpilot

I'm a stomach sleeper so finding a mattress that is both firm enough, but also cushioned enough for my hip and shoulder pressure points is always a challenge. The folks at Ultrabed in Agoura Hills, CA were amazing. They let me try out every firm mattress they had and explained the differences between them. I settled on the Back Science Series 2, it has the perfect combo of firmness and cushioning. The lumbar support is great and helps keep my hips elevated properly and the gel foam topper gives just the right about of cushion without feeling like I'm drowning (a relief after having achy hip pressure points every morning from my old mattress). The edge support and motion isolation are also great. The delivery and set-up was super easy and they even called to check-up on me after a few weeks of sleeping on the new mattress to see if everything was feeling good. The only thing this magical mattress couldn't do was convince my cat not to wake me up at 5 am.

Back Science™ Mattress Review Photo

Mary Linn, November 19, 2023

5 out of five star rating on Trustpilot

I found our mattress by going to the local mattress store and trying it out. The salesperson listened to our needs, he was most helpful and knowledgeable, explaining which mattress we would most benefit from. We went with the Back Science Series 2 Mattress and the Adjustable Bed with Lumbar Back-Flex Technology.They offered a good return/exchange policy in place in case it did not work out. About 2 months later, I received a phone call to see how satisfied we were with the bed. I shared the bed is amazing, especially how the adjustable bed cradles you but I would have liked it to be a little firmer along the edge. They scheduled the mattress to be the same day, pick up/return, so to give it the firmer support we were looking for. We could not be happier with our Back Science Series 2 Mattress and the service was over the top!

Better Business Bureau Hall of Fame

For over 23 years our company's high level of customer care has earned us an A+ rating from the Better Business Bureau. As well, we have become a 2012 Hall of Fame member with our exceptional customer service.

*The Patented Airflow Transfer System Technology is protected by US Patent No. 7,334,280

**Back Science™ is a trademark of Relief-Mart Coreporation, Whereas Sleep Number® is a registered trademark of Sleep Number Corporation. All mentions of Sleep Number on this site are for the purposes of comparison and review.

***The BackFlex™ Back Stretch Program on our adjustable bases has a patent pending and is the sole intellectual property of Relief-Mart Corporation.

****Any copyrighted materials used on this site without the express permissions of the copyright owner are protected by fair use law. Under section 107 of the Copyright Act of 1976, allowance is made for "fair use" for purposes such as criticism, news reporting, teaching, scholarship, education, and research.