Sealy Posturepedic Plus Mount Auburn Review

In This Review
Performance Tests | Firmness | Support & Sleeping Positions | Design | Materials | Comparisons | FAQs

At NapLab, we put each mattress to the test.

We test 10 different factors that impact the performance, comfort, and value of the mattress. We then take the results of that test and compare to every mattress we’ve tested to date.

Check out the full performance table below to see how this mattress ranks:

Factor	Sealy Pousturepedic Plus Mount Auburn	Average
Overall Score	6.98	8.60
Price (Queen)	$700	$1,201 (Coil only)
Cooling – Score	7.0	8.7
Sinkage – Depth	1.65″	2.14″
Sinkage – Feel	Very Minimal	Moderate
Motion Transfer – Score	6.7	8.1
Motion Transfer – Acceleration	12.31 m/s²	8.81 m/s²
Response Time – Score	7.7	9.0
Response Time – Mostly Recovered	0.4 sec.	0.4 sec.
Response Time – Fully Recovered	2.0 sec.	0.9 sec.
Bounce – Height	10.54″	9.73″
Bounce – Feel	High	Moderate
Edge Support – Score	9.2	8.6
Edge Support – Sitting	3.50″	4.05″
Edge Support – Lying	Excellent	Good
Sex – Score	8.9	8.5
Pressure Relief – Score	6.0	8.8
Comfort Layer Thickness	4.0″	4.1″
Mattress Thickness	13″	12.0″
Off-Gassing – Score	2.2	8.3
Off-Gassing – Smell	Strong	Strong
Off-Gassing – Days	28 days	6 days
Company – Score	6.8	8.7
Trial	365 nights	167 nights
Warranty	10 years	24% have lifetime warranties, average of other 76% of mattresses is 13 years

How is Sealy Posturepedic Plus Mount Auburn Different?

The Sealy Posturepedic Plus Mount Auburn is a 13″ coil mattress with below-average performance, but also a price that is less than the average as well. While these savings can be attractive to consumers, they do come at a cost, and sacrifices in performance are made.

Advantages

Besides the price, other advantages to Sealy include better-than-average edge support and a good sex score (thanks largely to the high level of bounce and supportive edges).

Neutral Factors

Sinkage levels are very minimal and bounce levels are high. If you like a mattress with minimal contour and an active, bouncy feel, the Posturepedic Plus could provide the feel you’re looking for.

Disadvantages

Disadvantages are numerous on this mattress as it scored below average in 6 of the 8 performance categories—cooling, motion transfer, response time, pressure relief, off-gassing, and company score.

For any mattress, this isn’t really the performance that we want to see. If you want a well-balanced mattress with solid performance, the Mount Auburn misses the mark.

The Sealy Posturepedic Plus Mount Auburn has a fair level of cooling performance. During our tests, I felt a moderate level of heat retention around my body.

The mattress is using lower-quality foams that seem to have a negative impact on cooling. These foams just don’t breathe as well as higher-quality foams. The innerspring unit helps to bring more airflow into the mattress, but it’s not enough to overcome the cooling limitations of this mattress.

• Baseline Temperature – the temperature of the mattress before anyone lies on it
• Maximum Temperature (0 minute) – the temperature of the mattress after lying on it for 15 minutes
• Ending Temperature (5 minute) – the temperature of the mattress after being lied upon and having no one on it for 5 minutes

According to Sealy, the mattress uses “SealyCool” air gel foam and “SealyCool” gel memory foam, in addition to a cooling cover.

Despite these claims, there was nothing particularly cool about this mattress. The cover did not have any type of cool-to-the-touch feel.

In addition, according to our objective testing, the foams are retaining more heat compared to the average. The Mount Auburn had a max surface level temperature of 91.5° F, which is 1.8° warmer than the average.

After getting off the mattress the temperature declined by 3.2° from minutes 0 to 1, which is 1.5 higher than the average.

When we consider the complete picture of objective data, subjective experience, and material analysis, I’m confident, in my view, that most sleepers will find the cooling performance to be disappointing.

Heat Dissipation Over Time

The Mount Auburn mattress has a very minimal level of sinkage. In our sinkage tests, the mattress had just 1.65” of pressure point sinkage. This is 0.49” less sinkage than the average of 2.14”.

The level of sinkage is documented in the image below.

This very minimal level of sinkage creates more of a floating feel above the mattress, as opposed to sinking down “in” the mattress.

The limited sinkage level, combined with comfort foams that don’t notably hug the body and innerspring unit, creates a more traditional type of a mattress feel.

If you want a mattress that hugs and contours your body Mount Auburn is not going to be a good choice.

The Sealy Posturepedic Mount Auburn has a high level of motion transfer. During our tests, we measured a total acceleration range of 12.31 m/s². This is 40% more motion transfer than the average of 8.81 m/s².

In our motion transfer chart, which visualizes our accelerometer data, we can see the highest motion from 0 to 0.15 seconds. We see a secondary spike from 0.52 to 0.68 seconds.

The level of motion transfer is also documented in the video below.

And it is not until 1.20 seconds that we return to near-zero levels of energy. The minimal level of sinkage, coil unit, and relatively low-quality level of foams are all having a negative impact on motion transfer.

Neither the motion duration nor motion spikes paint a pretty picture. Overall motion transfer is high.

The Sealy Mount Auburn has a moderate level of material response. In our mostly recovered response time test, we measured a fast material recovery of 0.4 seconds.

This is very slightly faster than the average mostly recovered time of 0.41 seconds.

The level of responsiveness is documented in the video below.

While the mostly recovered time was fast, the same isn’t true for full material recovery. In our full material recovery, we measured a very slow recovery speed of 2.0 seconds, which is 1.12 seconds slower than the average full material recovery of 0.88 seconds.

While I am pleased with the mostly recovered time, the 2.0 seconds for a full material recovery is very slow. Many sleepers may find this level of responsiveness simply creates a less-than-great comfort dynamic.

If there is a silver lining, it is that the Mount Auburn has a very minimal sinkage level and doesn’t overly hug the body. For these reasons, most sleepers shouldn’t feel overly stuck in the mattress, despite the slow response time.

The Sealy Posturepedic Plus has a high level of bounce. In our tests, we measured a total bounce height of 10.54”. This is 0.81” more bounce than the average of 9.73”.

The level of bounce is also documented in the video below.

As expected, the mattress creates ample bounce due to the minimal sinkage created by the foams, use of poly foam instead of memory foam, and innerspring coil unit.

The Mount Auburn creates more of a classic and traditional coil feel, and big bounce comes along with that. While high bounce isn’t for everyone and it will negatively impact motion transfer, it does greatly improve sex and ease of movement. 

The Sealy Posturepedic Plus Mount Auburn has excellent edge support for both sitting and lying. In our sitting edge support tests, we measured a sitting sinkage compression of 3.5”. This is 0.55” less sitting sinkage than the average of 4.05”.

The level of edge support while seated is documented in the images below.

Even while sitting directly on the edge of the mattress it remains supportive and there was no collapse of the materials. Lying edge support is equally as good. During our tests, I felt well-supported in all sleeping positions, even when lying directly on the edge of the mattress.

The level of edge support while lying is documented in the images below.

According to Sealy, the mattress is equipped with the “DuraFlex Edge System”. Unfortunately, Sealy doesn’t explain what that system is exactly.

Based on my experiences with the mattress, my best guess is it simply means it contains one or more reinforced coil layers running along the perimeter of the mattress. Despite the lack of explanation from Sealy, the mattress has excellent edge support.

The Sealy Posturepedic Mount Auburn has good, but not amazing sex performance. On the positive side, the mattress has a very high level of bounce and excellent sex performance.

Bounce and edge support are the two most important factors, so it’s great to see these two categories do well. In addition, noise is kept to a minimum, despite the more traditional mattress design.

However, for negatives, we have a mediocre level of pressure relief and only fair cooling performance. Despite these weaknesses, overall the Mount Auburn is still a solid surface for your dance without pants.

Sex Factor	Factor Weight	Score	Rating
Bounce	65%	9.1	Very High
Edge Support	20%	9.4	Excellent
Noise	5%	10	Minimal
Pressure Relief	5%	6.0	Mediocre
Cooling	5%	7.0	Fair

The Sealy Posturepedic Plus Mount Auburn has a mediocre level of pressure relief. During our tests, I experienced a moderate to significant level of pressure point buildup on my body.

Ultimately, the mattress just isn’t particularly comfortable to lie on for any extended period of time.

While the Mount Auburn does use 4.0” of comfort foam, those foams aren’t especially high quality looking and don’t feel great on the body. I can definitely feel the coils on the mattress, which is contributing to the lack of pressure relief.

This is the 3rd Sealy mattress we’ve tested from Costco. The other two, the Sealy Posturpedic Carver and Sealy Posturepedic Plus Ridgecrest II, had similar issues with pressure relief.

The basic design of these mattresses, in combination with foam layers that look and feel notably lower quality compared to many others we’ve tested, result in a pressure relief dynamic that leaves much to be desired. 

Pressure Map – Side Sleepers

Pressure Relief (PSI)	Average	Minimum	Maximum
Side Sleepers	0.25	0.02	1.49

Pressure Map – Back Sleepers

Pressure Relief (PSI)	Average	Minimum	Maximum
Back Sleepers	0.15	0.02	1.28

Pressure Map – Stomach Sleepers

Pressure Relief (PSI)	Average	Minimum	Maximum
Stomach Sleepers	0.17	0.02	1.57

Off-gassing on the Sealy Mount Auburn is strong right out of the box and the odor took 28 days to fully dissipate.

This is significantly more off-gassing smell than the average, which is around 6 days.

Sealy mattresses purchased from Costco (which as far as we can tell is the only place the Mount Auburn is sold) are serviced by Costco’s policies. Costco provides a 10 year warranty and a return / refund policy that is incredibly generous, effectively allowing you to the return the mattress at any time.

Company Factor	Factor Weight	Score	Data
Trial Period	15%	10	365 nights
Warranty	10%	8.0	10 years
Shipping	5%	10	$0
Returns	20%	10	$0
Trust	50%	4.0	Terrible
Country of Origin	0%		USA

The average trial period is 166 nights and the average warranty is 14 years (excluding 25% of mattresses that offer lifetime warranties).

The Sealy Posturepedic Plus Mount Auburn has a firmness of 6 out of 10, where 10 is the most firm.

This gives the mattress a medium-firm feel, the most popular firmness and widely accepted by a range of sleeper preferences.

The Sealy Posturepedic Plus Mount Auburn has a fair level of support. That said, it is far from amazing. During our tests, I felt well-supported by the mattress in all sleeping positions.

However, in my view, the mattress just isn’t comfortable. During testing, I felt moderate to significant pressure points on my body.

This pressure made it hard to stay in the same spot comfortably on the mattress, which negatively impacts the overall support experience on the mattress.

In my view, whether or not a mattress has good support comes down to whether it can keep the spine in alignment in each respective sleeping position, while also remaining comfortable.

The comfort issues compound into support issues. As a result, this is a mattress that I expect many sleepers will find unsupportive.

Check out the table below to see the sleeper weights and sleeping positions that would be best suited for this mattress.

Sleeper Weight	Stomach Sleepers	Side Sleepers	Back Sleepers
Under 150 lbs.	Maybe	Maybe	Maybe
150-250 lbs.	Maybe	No	Maybe
250-300 lbs.	No	No	No

Heavier-weighted bodies in particular are more likely to find the mattress creates support issues, as the same pressure relief issues that impacted my relatively lightweight body at 140 pounds will more significantly impact heavier-weighted sleepers. 

Design

The Sealy Posturepedic Plus Mount Auburn is a 13″ coil mattress with a medium-firm feel (6 out of 10 on the firmness scale).

Materials

In total, there are four distinct layers that make up the Mount Auburn mattress. The top two layers are devoted to comfort and the bottom two are support layers.

From top to bottom, here is a detailed breakdown of each of the layers:

• 2.0” quilted cover
• 2.0” poly foam
• 8.0” pocketed coils
• 1.0” support foam

The Cover

The cover of this mattress is quilted with cool-to-the-touch fibers for improved performance. It is also treated with a Surface-Guard technology designed to protect the mattress from spills, allergens, and other bacteria.

This cover has a 2.0″ foam integrated inside, which gives the mattress a decent amount of loft and yet minimal sinkage.

The Comfort Layer

The comfort layer is a 2.0″ poly foam for the majority of the mattress, but there is also a gel foam used at the center 1/3 of the mattress.

This gel foam helps target the heaviest parts of your body to prevent spinal alignment issues and improve overall support and pressure relief.

The Support Layer

The support layer is an 8.0″ pocketed coil system, where each coil is individually encased in a thin fabric. This encasement is also perforated with small holes (as shown below) that improve airflow within the body of the mattress.

Product Evolution

The Sealy Mount Auburn was launched at Costco back in 2022. Since its initial release, there have been no major design or material changes made to this mattress.

The Mount Auburn comes as a sibling release to an existing robust Posturepedic Plus collection by Sealy.

Click here to check out our other reviews from within the Posturepedic collection:

• Sealy Posturepedic Hybrid
• Sealy Posturepedic Carver
• Sealy Posturepedic Plus RidgeCrest II

Other Mattresses to Consider

Not sure if the Sealy Posturepedic Plus Mount Auburn is the right pick for you? Check out these three top-rated budget hybrid mattresses you may want to consider.

Frequently Asked Questions

Still have questions? Check out some of the top FAQs on the Sealy Posturepedic Plus Mount Auburn mattress below and get the answers you’re looking for.