BedInABox Tranquillium Mattress Review

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Overview

BedInABox Tranquillium Mattress

The BedInABox Tranquillium mattress is a comfortable and cool all-foam mattress made with a perfect blend of CoolRest memory foam and Sure Align support foam. It is 12 inches thick and categorized as a firm mattress, which provides ample support and greater spine alignment while sleeping.

Final Sleepiverse Rating

4.8

out of 5

Product Details
Mattress Material icon
MATERIAL
Memory Foam
firmness icon
FIRMNESS
Firm
trial period icon
TRIAL
PERIOD
120 Night Free Trial
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FREE SHIPPING & RETURNS
Free Shipping and Returns
warranty icon
WARRANTY
20 Years Warranty
price icon
PRICE
RANGE
$999 - $1,699
This mattress is a good choice for:
Pain Relief

Ideal for people looking for back and spine pain relief.

Minimal Softness

Ideal for people who prefer only a bit of softness.

Couples

Offers excellent motion isolation and other features with couples in mind.

Stomach Sleeping

Ideal for lightweight, average weight, and heavyweight stomach sleepers.

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BedInABox is a leading online mattress retailer that has been in business since 2004. They are passionate about creating high-quality, affordable, and convenient mattresses.

While all of their mattresses are made with memory foam, the Tranquillium differs from the others in that it has a breathable Tencel cover and is considered to be the firmest mattress in the line.

BedInABox strives to create the most comfortable mattresses possible using the finest materials, and the Tranquillium is no exception.

BedInABox Tranquillium mattress

In this review, we will focus on the BedInABox Tranquillium mattress, specifically regarding:

  • Pros and cons.
  • Unboxing experience.
  • Feel and comfort.
  • Construction and design.
  • Performance test results.
  • Warranty policies, company policies, and all the FAQs you might want to know.

BedInABox Tranquillium Overview

Pros

  • Spinal alignment: The Tranquillium mattress is designed to provide good spinal alignment. The top layer of memory foam conforms to your body, while the support foam underneath provides the necessary support. This can help reduce pain and improve sleep quality.
  • Sleeps cool: The mattress is made with a breathable Tencel cover that helps to wick away moisture. This can help you sleep cooler, especially if you are a hot sleeper.
  • High-quality materials: The Tranquillium mattress is made with high-quality materials, including memory foam and support foam. This ensures that the mattress will last for many years.
  • Comfortable: The Tranquillium mattress is comfortable for most people. The memory foam conforms to your body, while the support foam provides the necessary support.
  • Supportive: The Tranquillium mattress is supportive for most people. The support foam provides the necessary support to keep your spine aligned.

Cons

  • May be too firm for some sleepers: The Tranquillium mattress is a firm mattress. Some people may find it too firm, especially side sleepers or those who are used to a softer mattress.

Who do we Recommend the BedInABox Tranquillium for

  • People who require more support: The Tranquillium mattress is a firm mattress, which means that it can provide good support for people who need it. This includes people who are overweight or obese, people who have back pain, and people who are active.
  • People who prefer greater bounce: The Tranquillium mattress does have some bounce, but not as much as some other mattresses. This may be a good thing for people who prefer a mattress with a little bit of give.
  • Hot sleepers: The Tranquillium mattress is designed to sleep cool, thanks to its breathable Tencel cover and cooling gel memory foam layer. This makes it a good choice for people who tend to sleep hot.
  • People who want a comfortable and supportive mattress that sleeps cool: The Tranquillium mattress is designed to be both comfortable and supportive, and it also sleeps cool. This makes it a good choice for people who are looking for a mattress that can meet all of their needs.

Unboxing the BedInABox Tranquillium

BedInABox was founded with the goal of making it easier and more convenient to buy a mattress. They were the first company to introduce the concept of a compressed, rolled-up mattress that could be shipped in a box.

The BedInABox Tranquillium mattress is easy to unbox, but it is heavy, weighing between 53 and 113 pounds. It may require two people to lift it. To unbox, simply remove the mattress from the box and unroll it onto your bed. Cut the outer layer of plastic with the provided letter opener. The mattress will quickly expand to its full size within seconds. The corners will also fluff up and expand, indicating great corner expansion.

Some memory foam mattresses that are shipped compressed in a box have a bad odor due to the chemicals in the foam being trapped in the packaging. However, this was not the case with the BedInABox Tranquillium. The company has a lot of experience in this area, and any smell that was present quickly dissipated within a few hours as the mattress expanded and regained its shape.

Firmness, Feel, and Comfort For BedInABox Tranquillium

BedInABox Tranquillium Firmness

The Tranquillium mattress is a firm mattress that is advertised to be firm (an 8 on our scale), which is true for light-to-average-weight sleepers. However, for heavier sleepers, it will feel more like a medium-firm mattress (a 6.5 on our scale). The soft top comfort layer provides a plush, luxurious feel, while the slightly firmer transition layer and a firm base layer provide firmer support below. This helps to keep your body well-supported and promotes excellent spine alignment.

BedInABox Tranquillium firmness scale

The soft top comfort layer allows you to sink into the mattress to a degree, but the slightly firmer transition layer below and the firm base layer prevent you from sinking all the way down through the mattress.

BedInABox Tranquillium Feel

When you first lie down on the BedInABox Tranquillium, you will feel the soft, plush top comfort layer sink around your body. This layer is made of gel memory foam, which is known for its ability to conform to the body and provide pressure relief.

As you sink into the mattress, you will feel the slightly firmer transition layer. This layer helps prevent you from sinking all the way through the mattress and provides additional support.

The bottom layer of the Tranquillium mattress is made of high-density support foam. This layer provides the firmness that helps to keep your spine aligned.

Overall, the BedInABox Tranquillium feels like a supportive and comfortable mattress. The soft top comfort layer provides pressure relief, while the firmer support layers help to keep your spine aligned.

BedInABox Tranquillium Comfort

The BedInABox Tranquillium mattress is quite comfortable, thanks to its plush top comfort layer and luxurious cover. The top comfort layer is made of gel memory foam, which is known for its ability to conform to the body and provide pressure relief. The luxurious cover is made of Tencel, which is a soft and breathable fabric that helps to keep you cool and comfortable.

The foam layers below the top comfort layer work to support and contour the body during sleep. These layers are made of high-density support foam, which provides the firmness that helps to keep your spine aligned.

The reviewers who tested the Tranquillium mattress had different sleeping styles and weights. They all found the mattress to be comfortable and supportive. Some of the reviewers said that they appreciated the soft top comfort layer, while others said that they liked the firm support of the foam layers below.

Sleeper WeightBack SleepersSide SleepersStomach Sleepers
Lightweight (Under 150 lb)Very GoodVery GoodExcellent
Average (150 – 250 lb)ExcellentVery GoodExcellent
Above Average (Over 250 lb)ExcellentExcellentExcellent

We will conduct further tests to assess the mattress's ability to relieve pressure later in our review.

Constructions, Materials, and Design

Materials and Design

The BedInABox Tranquillium is an all-foam mattress that is 12 inches tall and rated as a firm bed. It is made up of three layers of various foams: a top layer of CoolRest gel memory foam, a middle layer of Pluralux transition foam, and a bottom layer of Sure Align support foam. The Tranquillium is CertiPUR-US® and OEKO-TEX® certified, which means that it meets strict standards for content, emissions, and durability, and has been tested for harmful substances.

Layers

BedInABox Tranquillium layers

  1. Tencel™ Cover: The cover is made of Tencel, which is a soft, breathable, and moisture-wicking fabric. It is also eco-friendly, as it is made from wood fibers.
  2. CoolRest® Memory Foam: This layer is 3 inches thick and made of gel memory foam. Gel memory foam is known for its ability to conform to the body and provide pressure relief. The open-cell design of the foam allows for more breathability and cooling.
  3. Pluralux® Foam: This layer is 2 inches thick and made of high-density foam. It helps to maintain the cushioning of the memory foam comfort layer and provides support and durability.
  4. Sure Align® Density Foam: This layer is 7 inches thick and made of high-density foam. It provides deep compression support for the body and helps to keep the spine aligned.

Performance of BedInABox Tranquillium

Cooling

Although all-foam mattresses tend to trap heat, the gel infusion in the Tranquillium's memory foam layer helps wick away body heat. The firm nature of the bed makes it loosely conform to the sleeper's body, thereby allowing for more airflow. This enables you to enjoy cooler sleep.

Different foams used in the construction of the Tranquillium mattress are specially designed to promote greater breathability and airflow, prevent the buildup of excessive body heat, and keep you cool and comfortable all night long. The 3 inches of CoolRest Gel memory foam in the top comfort layer, with its open cell structure, prevents the buildup of excessive body heat and promotes greater airflow through the mattress.

In our cooling performance test, the BedInABox Tranquillium mattress was able to keep testers at a comfortable temperature throughout the 20-minute test, without overheating. The mattress didn't have any special cooling features, but it performed well for an all-foam mattress with memory foam. It was given a rating of 4/5 for cooling.

Responsiveness

The responsiveness of the BedInABox Tranquillium mattress is considered to be medium. This means that it is not too soft and not too firm. It provides a balance of both comfort and support.

A reviewer sitting on BedInABox Tranquillium

The top layer of gel memory foam is designed to conform to the body and provide pressure relief. The middle layer of Pluralux foam provides support and durability. The bottom layer of Sure Align foam provides deep compression support for the body and helps to keep the spine aligned.

The combination of these layers provides a responsive mattress that allows you to move around easily without feeling stuck.

The responsiveness of the BedInABox Tranquillium mattress was tested by placing a 20-pound ball on it and measuring how long it took for the mattress to return to its original shape. The mattress bounced back in about 1.3 seconds.

Overall, the Tranquillium mattress is not the most responsive mattress, as most all-foam mattresses are. However, it is still responsive enough that you will not feel stuck in place. We gave it a rating of 4.2/5 for responsiveness.

Motion Isolation

Motion isolation is the ability of a mattress to prevent sleepers from feeling when their partner moves. The Tranquillium mattress is an all-foam mattress, and foam is known for its ability to absorb motion. The dense foam layers of the Tranquillium mattress prevent motion from traveling to other parts of the mattress, which helps to ensure that you will not be disturbed by your partner's movements.

We conducted two standard tests to assess the motion isolation performance of the BedInABox Tranquillium mattress. We first placed a glass half full of water on top of the mattress and dropped a 20-pound ball on the other side. The water barely sloshed, which indicates that the mattress has good motion isolation.

Next, we had one partner lie on one side of the mattress while the other partner rolled around on the other side. The partner lying still reported that they felt no movement.

These two tests suggest that the Tranquillium mattress has excellent motion isolation. We rated it 4.7/5 for motion isolation.

Edge Support

Edge support is the ability of a mattress to maintain its shape and provide support near the edges. Firm edge support is important for people who like to sleep on the edges of the bed or who want to sit on the edge of the bed without feeling like they are going to roll off.

The BedInABox Tranquillium mattress has good edge support. The dense foam layers in the mattress prevent you from sinking too deep into the bed, even when you are sleeping on the edge.

To test the edge support of the BedInABox Tranquillium mattress, we sat on the edge of the mattress. We did not feel like the mattress was sinking too much.

We also applied firm pressure to the edges with our hands. The mattress did not spring back as quickly as some other mattresses, and we were able to push more into it before feeling any resistance.

Overall, we were impressed with the edge support of the BedInABox Tranquillium mattress. It is a good choice for people who want a firm mattress with good edge support. We gave the mattress a 4.7/5 for its edge support.

Noise

The noise isolation performance of the BedInABox Tranquillium mattress is good. The dense foam layers in the mattress help to absorb sound, so you are less likely to hear your partner moving around.

We dropped a 20-pound ball on the BedInABox Tranquillium mattress to test its noise isolation performance. We listened for any squeaks or other noises, but we did not hear anything. This suggests that the mattress is silent.

Therefore, we gave the mattress a 5/5 rating.

Sex

The BedInABox Tranquillium mattress is a good choice for couples who want a comfortable and extremely supportive mattress. It is made with memory foam gel, which conforms to the body and provides pressure relief. The mattress also has good edge support, which is important for couples who like to sleep near the edge of the bed.

The BedInABox Tranquillium mattress is not as cool as some other mattresses, so it may not be the best choice for couples who sleep hot. However, it is a good value for the price and is a comfortable and supportive mattress for sex.

We gave it a 4.8/5 rating regarding sex performance.

Pressure Relief

The pressure relief performance of the BedInABox Tranquillium mattress is great. The memory foam in the mattress conforms to the body and provides pressure relief to the key pressure points, such as the shoulders, hips, and lower back.

We conducted a pressure mapping test to assess the pressure relief performance of the BedInABox Tranquillium mattress. In this test, we measured the pressure at different points on a partner's body as they lay on the mattress for 20 minutes. The bluer the map, the better the pressure relief.

BedInABox Tranquillium pressure map

According to the results of the pressure map, we concluded the following:

  • Side sleepers: Side sleepers need a soft mattress to relieve pressure on their shoulders and hips. The Tranquillium mattress is firm, so it may not be the best choice for side sleepers who are lightweight. However, heavyweight side sleepers should find the Tranquillium mattress to be comfortable.
  • Back sleepers: Back sleepers need a supportive mattress to keep their spine in alignment. The Tranquillium mattress is firm, but it also provides some sinkage, which is important for back sleepers. Average weight back sleepers should find the Tranquillium mattress to be comfortable.
  • Stomach sleepers: Stomach sleepers need a firm mattress to prevent their spine from curving too much. The Tranquillium mattress is firm and should be comfortable for stomach sleepers of all weights.

Overall, the pressure relief performance of the BedInABox Tranquillium mattress is good. It is a good choice for back sleepers and stomach sleepers of all weights. Lightweight side sleepers may prefer a softer mattress.

We gave the BedInABox Tranquillium mattress a 4.8/5 for pressure relief.

BedInABox Tranquillium Warranty and Company Policies

Warranty

Below is a table summarizing the warranty terms for the BedInABox Tranquillium mattress.

Warranty periodCoverageExclusions
10 yearsCovers defects in workmanship or materials. If the mattress develops a visible indentation of 1 inch or more within the first 5 years of ownership, or 1.25 inches or more within years 6-20, it will be replaced or repaired at no chargeNormal wear and tear, indentations caused by a sag in the foundation, adjustable bed, or platform
Years 11-20If you need to replace your BedInABox mattress after the 10-year warranty period, you will be charged a prorated amount. The prorated amount starts at 50% of the original purchase price in year 11 and increases by 5% each year.
For example, if your mattress costs $1,000 and you need to replace it in year 12, you will be charged $500. If you need to replace it in year 13, you will be charged $525. And so on.See above

Trial

BedInABox offers a 120-night sleep trial on their Tranquillium mattress. This means that you can try the mattress for 120 nights and return it for a full refund if you are not satisfied. This gives you plenty of time to test out the mattress and see if it is the right fit for you.

Returns

You can return your mattress for a full refund within 120 days of purchase, but you must use it for at least 60 nights first. This is to give your body enough time to adjust to the new mattress.

The mattress must be in new condition, meaning it must be free of stains, rips, or other damage. If the mattress is not in new condition, BedInABox may charge a restocking fee.

Shipping

BedInABox offers free shipping for their BedInABox Tranquillium mattress to the contiguous United States, excluding Alaska and Hawaii. The mattress typically arrives within 5 to 7 business days.

Pricing

The BedInABox Tranquillium mattress is available in a variety of sizes, with starting prices as follows:

SIZEDIMENSIONSPRICE
Twin38″ x 74″ x 12″$999
Twin XL38″ x 80″ x 12″$1,099
Full54″ x 75″ x 12″$1,299
Queen60″ x 80″ x 12″$1,499
King76″ x 80″ x 12″$1,699
Cal King72″ x 84″ x 12″$1,699

BedInABox Tranquillium sizes

To learn more about discounts, please visit the BedInABox website.

The BedInABox Tranquillium mattress is competitively priced, with many other beds coming in at a similar price. However, this mattress is a true catch considering its performance. We gave it a 5/5 for value, as it offers a great combination of comfort, support, and durability.

Policies Overview

POLICYDETAILS
Warranty20-Year Warranty Mattress
Trial120-Nights Free Trial
Return PolicyFree Returns
ShippingFree Shipping in Canada and the US
Financing OptionsZero Interest - Via Affirm
Country of OriginProudly made in the US

FAQs about the BedInABox Tranquillium mattress

What is the best sleeping position for the BedInABox Tranquillium mattress?

The BedInABox Tranquillium mattress is a good choice for all sleeping positions. However, it may be the best choice for back sleepers and stomach sleepers. Back sleepers need a supportive mattress to keep their spine in alignment, and stomach sleepers need a firm mattress to prevent their spine from curving too much.

How long does the BedInABox Tranquillium mattress last?

The BedInABox Tranquillium mattress is expected to last for 10-30 years. However, the lifespan of the mattress will vary depending on the weight of the sleeper, the frequency of use, and the care and maintenance of the mattress.

Is the BedInABox Tranquillium mattress good for couples?

The BedInABox Tranquillium mattress is a good choice for couples. The firmness of the mattress provides good edge support, which is important for couples who like to sleep near the edge of the bed. The mattress also has good motion isolation, which means that you are less likely to feel your partner's movements.

How does the BedInABox Tranquillium mattress compare to other mattresses?

The BedInABox Tranquillium mattress is similar to other all-foam mattresses in terms of its firmness and support. However, it is unique in that it uses a gel memory foam that provides cooling. This makes it a good choice for hot sleepers.

BedInABox Tranquillium Mattress Review Final Verdict

Overall Rating

4.8

out of 5

firmness icon
Edge Support
4.7/5
pressure relief icon
Motion Isolation
4.7/5
price icon
Value
5/5
type icon
Materials
5/5
warranty icon
Company Policies
5/5
trial period icon
Pressure Relief
4.8/5
temperature icon
Temperature Regulation
4/5
unboxing experience score icon
Unboxing Experience
5/5
responsiveness score icon
Responsiveness
4.2/5
low noise score icon
Low-Noise
5/5
Sex Performance
4.8/5

Conclusion

The BedInABox Tranquillium is a great all-foam mattress that provides pressure relief. It's also supportive and cradles you just right, making you feel like you're sleeping on top of the mattress.

If you're looking for a firm and comfortable mattress that will help you sleep soundly, the BedInABox Tranquillium is a great option.

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BedInABox Tranquillium Mattress

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Dom Abraham

As the lead content writer at Sleepiverse. Dom pours his heart into writing mattress reviews, bedding product reviews, and medically-reviewed health articles. Dom is from Portugal and likes to spend his free time writing on the beach as it gives him a sense of comfort. Aside from writing mattress reviews in front of the soothing beach view, Dom likes to experiment with new amazing food ideas.