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Tranquillium Mattress with Bed in a Box  Couple on Tranquillium Mattress  Man with Coffee on Bed in a Box Mattress 

Tranquillium®

12” firm multilayer foam construction with CoolRest® Gel memory foam and a soft knit Tencel® cover.
$749.25 $999
All deliveries are carbon neutral
Ships Free Within 24 Hours

Mattress Benefits
12

12" construction,
3 layers

Plush CoolRest®comfort layer

Plush CoolRest®
comfort layer

Soft knitTencel™ cover

Soft knit
Tencel™ cover

Accommodates allsleep positions

Accommodates all
sleep positions

CertiPUR-US®certified

CertiPUR-US®
certified

Best technology, even better price.

BedInABox® Tranquillium Cutaway

Best technology,
even better price.

  1. 1. Luxurious 420 gram weight circular knit Tencel™ cover paired with a sleek grey border fabric. It sleeps as good as it looks.

  2. 2. 3 inches of CoolRest® 3lb Memory Foam - the most advanced, consistent and highest quality gel foam available.

  3. 3. 2 Inches of Pluralux® foam that maintains the cushioning of the memory foam comfort layer while slowling building support.

  4. 4. 7 inches of Sure Align® 2lb density foam.
    Designed to support and correctly align your spine.

Best technology,
even better price.

BedInABox® Diagram BedInABox® Diagram

  1. 1. Luxurious 420 gram weight circular knit Tencel™ cover paired with a sleek grey border fabric. It sleeps as good as it looks.

  2. 2. 3 inches of CoolRest® 3lb Memory Foam - the most advanced, consistent and highest quality gel foam available.

  3. 3. 2 Inches of Pluralux® foam that maintains the cushioning of the memory foam comfort layer while slowling building support.

  4. 4. 7 inches of Sure Align® 2lb density foam.
    Designed to support and correctly align your spine.

Firm &
supportive sleep

A multilayer foam construction with
a firm, supportive feel.

Soft Tencel™ top cover with
moisture management properties.

Designed to conform to your body
to provide maximum support.

Firm &
supportive sleep

A multilayer foam construction with
a firm, supportive feel.

Soft Tencel™ top cover with
moisture management properties.

Designed to conform to your body
to provide maximum support.

How Supportive Do I Feel?

BedInABox® offers mattresses that range from medium-soft to firm in feel, to meet every sleep need. See where this mattress ranks on the firmness scale.


This mattress is firm

Mattress Specifications

Materials & Construction

12" BedInABox® Tranquillium®
3" - 3 lb CoolRest® Gel Memory Foam
2" - Pluralux® foam
7" - 2 lb SureAlign® High Density Support Foam


Certifications

CertiPUR-US® certified. Meets CertiPUR-US® standards for content, emissions and durability, and are analyzed by independent, accredited testing laboratories.

OEKO-TEX® certified. Tested for harmful substances.

CertiPUR-US® Certified    OEKO-TEX® Certified    OEKO-TEX® Certified   


Warranty

20-Year Limited Warranty

Dimensions & Weight

SIZE DIMENSIONS WEIGHT
TWIN 38"x75"x12" 53 lbs
TWIN XL 38"x80"x12" 62 lbs
FULL 54"x75"x12" 76 lbs
QUEEN 60"x80"x12" 90 lbs
KING 76"x80"x12" 113 lbs
CAL KING 72"x84"x12" 113 lbs

Frequently Asked Questions

How does the Tranquillium® mattress feel?

The BedInABox® Tranquillium® mattress is a firm 12” all foam construction, featuring our CoolRest® Gel Foam comfort layer, a Pluralux® Foam transition layer and a Sure Align™Foam support layer. The transition layer helps maintain the cushioning of the comfort layer while slowly building support.

Which foundations are compatible with the Tranquillium® mattress?

BedInABox® mattresses are designed to be paired with any standard solid or slatted foundations for adequate support. Our Clever Connect™ Foundation, Platform BedInABox® foundation and MotionInABox® Adjustable Beds are all compatible with the Tranquillium® mattress.

How does the Tranquillium® compare to other brands?

Unlike many other mattress-in-a-box brands who outsource materials and manufacturing, BedInABox® manufactures all of our mattresses in the United States. We oversee every component of the process, from foam pouring to shipping, to ensure our customer’s satisfaction.

Is the Tranquillium® CertiPUR-US® certified?

Yes, all BedInABox® mattresses are CertiPUR-US® certified. This means that the foams used to build the Tranquillium® mattress have been tested for content, emissions, and durability by accredited laboratories and are certified free from a number of potentially hazardous compounds. This certification ensures that your mattress is safe for the consumer and the environment. You can learn more about the CertiPUR-US® certification here.

What benefits does the CoolRest® layer offer?

The CoolRest® comfort layer is infused with CoolRest® technology to keep you from sleeping hot while providing the perfect level of contour for that “hugging” sensation.

What is the Sure Align™ Foam in BedInABox® mattresses?

Sure Align™ is the firm support foam used in every BedInABox® mattress. It is designed to provide the perfect level of support and alignment for your spine.

What is a mattress in a box?

A BedInABox® mattress in a box is a high-quality memory foam mattress that is compressed and rolled into a box before shipping. We developed the technology to compress and roll mattresses in 2006, so that the mattress shopping and delivery process could be simplified by eliminating the need for in-store visits and traditional mattress delivery. We offer mattress in a box options in all standard mattress sizes and in firmness levels that support every sleep need.

How long can my mattress stay in the box?

Your BedInABox® mattress should be unboxed upon arrival. However, if you need to wait to unbox your new bed, it can remain roll-packed and boxed for no longer than 30 days. We ask that you unbox within this timeframe so that you do not void the warranty.

When can I sleep on my mattress in a box?

Your mattress is ready to go to bed when you are. BedInABox® mattresses are ready to use within minutes of opening.

Will I need to flip my mattress?

No, BedInABox® mattresses are not designed to be flipped. We do suggest rotating your BedInABox® every six months to prevent uneven wear and to prolong the life of your mattress.

Catch the latest news about new bed in a box products, current promotions and helpful sleep tips from our team of experts.

Latest Snooze

Catch the latest news about new bed in a box products, current promotions and helpful sleep tips from our team of experts.

Get in touch with our in-house bed in a box Customer Service Specialists. They're just a chat, email or call away.

Have questions?

Get in touch with our in-house bed in a box Customer Service Specialists. They're just a chat, email or call away.

No worries, sleep happy!

Free Shipping Icon

Free Shipping

And Returns! 2-5 day shipping in the contiguous U.S.

120-Night Trial Icon

120-Night Trial

Risk free. You pay for nothing if you're not satisfied.

20-Year Warranty Icon

20-Year Warranty

We stand behind our mattresses with a 20-year warranty.

Made In America Icon

Made In America

All of our mattresses are manufactured in North Carolina.

Certified Icon

Certified

CertiPUR-US® certified, content tested.

No worries, sleep happy!

  • Free Shipping Icon

    Free Shipping

    And Returns! 2-5 day shipping in the contiguous U.S.

  • 120-Night Trial Icon

    120-Night Trial

    Risk free. You pay for nothing if you're not satisfied.

  • 20-Year Warranty Icon

    20-Year Warranty

    We stand behind our mattresses with a 20-year warranty.

  • Made In America Icon

    Made In America

    All of our mattresses are manufactured in North Carolina.

  • Certified Icon

    Certified

    CertiPUR-US® certified, content tested.

See why our customers love the Tranquillium®.

Sleep Essentials