The Essential Base

BackFlex™ 1 Adjustable Base

  • Separate Head & Feet Adjustability
  • Zero-Gravity Position
  • Backlit Wireless Remote
  • Adjustable Leg Heights
  • Zero Clearance Design

Weightless Pressure-Relief

Zero Gravity mode puts you in a position where you feel weightless, taking much of the pressure off of your lower back to help you rest and recover form the day.

Improved Circulation

Raising the feet section or lounging in Zero Gravity mode lifts your legs above your heart, greatly improving circulation and relieving pressure from your legs which can help prevent blood clots, varicose veins, DVT, and others conditions.

Adjustable Leg Heights

All our adjustable bases have legs which come in segments that can be added or removed during installation to bring your bed to the height you want for your existing frame or bed setup.

Twin: 38"W x 75"L x 15"H

TwinXL: 38"W x 80"L x 15"H

Full: 54"W x 75"L x 15"H

Queen: 60"W x 80"L x 15"H

Eastern King: 76"W x 80"L x 15"H

California King: 72"W x 84"L x 15"H

Split E-King: 2X (38"W x 80"L x 15"H)

Split Cal-King: 2X (36"W x 84"L x 15"H)

$1,189 - $2,039



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Separate Head & Feet Adjustability

All BackFlex™ adjustable bases allow the ability to separately adjust and raise the head & feet section. Our bases bend at the knee to conform to your leg's natural resting position and promote better circulation.

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Weightless Zero-Gravity Position

Zero Gravity mode takes the pressure off your lower back and makes you feel weightless. It also elevates your feet above your heart for improved circulation and doubles as prime movie-watching position for those cozy stay-at-home nights.

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Doctor Recommended

Tested and recommended by our Head of Product Development, Chiropractor Dr. Rick Swartzburg, D.C., as well as other doctors and healthcare workers alike.

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.