BedInABox Tranquillium Mattress Mattress

Mattress Comparison

Brand BedInABox
Mattress Type Memory foam
Prices $899 $739
Shop Twin
$999 $824
Shop Twin XL
$1,199 $994
Shop Full
$1,399 $1,164
Shop Queen
$1,599 $1,334
Shop King
$1,599 $1,334
Shop Cal King
Our Promotions

Trial & Warranty

Trial Period
Trial Period (nights) 120
Warranty Length (years) 20

Firmness Options

One Firmness Fits All?
Adjustable Firmness
Flippable / Reversible Firmness
Half-Half Firmness
Selectable Firmness
Firmness Info A firmer and supportive feel.

Mattress Construction

Materials Overview A 3-layer construction:
  • 3" 3lb Density CoolRest® Memory Foam Infused with Liquid Gel
  • 2" Pluralux Foam
  • 7" 2lb Density Sure Align Support Foam
  • Smooth Knit Cover.
Comfort Info 3 lb density memory foam rebounds (takes it shape) quicker making it easier to change positions.
The TENCEL® cover is a performance fabric like no other, absorbing moisture completely and naturally, creating a cooler and more comfortable sleep. With more breathability than cotton, and a softer hand than silk, TENCEL® can be found anywhere from athletic wear to luxurious bedding. Nothing is dreamier than going to sleep on a bed made with TENCEL® fibers.
Support Info Our CoolRest™ gel advanced memory foam quickly conforms to your body for pressure relief and support without letting you sink too far into the mattress.
Comfort Specs Open cell memory foam increases air flow, contributing to a cooler sleep.
Sure Align foam works in tandem with CoolRest® Gel memory foam and provides perfect support for long lasting comfort.
Support Specs CoolRest® Gel memory foam perfectly contours to your body providing improved pressure relief to reduce tossing & turning.
Sure Align foam designed to support & correctly align your spine so you can sleep better.
Fabric Specs The TENCEL® cover offers unique moisture management properties - absorbs 50% more moisture than cotton, making it a highly effective performance fabric. Rapid absorption of moisture proves most effective in inhibiting bacterial growth naturally, without adding any chemicals.


Side Sleepers
Back Sleepers

Size & Weight

Twin Dimensions 38" x 75" x 12"
Twin Weight (lb) 53
Twin XL
Twin XL Dimensions 38" x 80" x 12"
Twin XL Weight (lb) 62
Full (Double)
Full Dimensions 54" x 75" x 12"
Full Weight (lb) 76
Queen Dimensions 60" x 80" x 12"
Queen Weight (lb) 90
King Dimensions 76" x 80" x 12"
King Weight (lb) 113
California King
California King Dimensions 72" x 84" x 12"
California King Weight (lb) 113


Manufactured in
United States
Number of other mattresses 3
Other mattresses
(Queen prices shown)
BedInABox Essential $749 $724
9" Memory foam
BedInABox Original $899 $739
11" Memory foam
BedInABox Azul $1,199 $994
11" Memory foam
Sister sites or brands
Sister mattresses
(Search by name to add to compare)

Certifications & Sustainability

CertiPur-US logo
Global Organic Textile Standard (GOTS)
Global Organic Latex Standard (GOLS)
USDA Organic
Rainforest Alliance Certified™
Forest Stewardship Council®
Certification Info


Delivery Cost FREE
Delivery Info

Typically, orders are shipped within two business days of receipt from our warehouse in Johnson City, TN via FedEx Ground. Delivery is usually 1-5 days depending on where you live.

Current Promotions
Prices$899 $739
Shop Twin
$999 $824
Shop Twin XL
$1,199 $994
Shop Full
$1,399 $1,164
Shop Queen
$1,599 $1,334
Shop King
$1,599 $1,334
Shop Cal King
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