Douglas Summit 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	Douglas Summit	Average
Overall Score	9.35	8.64
Price (Queen)	C$1,299	$1,095 (Foam only)
Cooling – Score	9.0	8.8
Sinkage – Depth	1.89″	2.16″
Sinkage – Feel	Minimal	Moderate
Motion Transfer – Score	9.9	8.2
Motion Transfer – Acceleration	5.25 m/s²	8.64 m/s²
Response Time – Score	9.9	8.9
Response Time – Mostly Recovered	0.2 sec.	0.4 sec.
Response Time – Fully Recovered	0.4 sec.	0.9 sec.
Bounce – Height	6.23″	9.69″
Bounce – Feel	Low	Moderate
Edge Support – Score	9.5	8.6
Edge Support – Sitting	2.75″	4.07″
Edge Support – Lying	Excellent	Good
Sex – Score	7.6	8.5
Pressure Relief – Score	10	8.8
Comfort Layer Thickness	5.0″	4.2″
Mattress Thickness	12″	12.0″
Off-Gassing – Score	8.6	8.4
Off-Gassing – Smell	Strong	Strong
Off-Gassing – Days	5 days	6 days
Company – Score	9.3	8.7
Trial	365 nights	165 nights
Warranty	20 years	25% have lifetime warranties, average of other 75% of mattresses is 14 years

Cooling performance on the Douglas Summit is excellent. In our tests, I felt no significant level of heat retention around my body.

• 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

Despite the all-foam construction the mattress seems to breathe well. The Summit uses a cooling cover made with a phase-change material (PCM).

PCM fibers are designed to create a “cool to the touch” feel when you first lie on them and gradually warm. They don’t get warm or hot, just “warmer” than when you first lie on them.

This type of cover helps create a cooler feel when you first get into bed and also when changing positions during the night.

In our objective tests, we measured a maximum surface level temperature of 85.1°F.

Heat Dissipation Over Time

From minutes 0 to 1 the temperature declined by 5.0° and by 11.0° from minutes 0 to 5. Overall, I’m pleased with the cooling performance on the Summit. 

The Douglas Summit has a minimal level of sinkage. In our tests, we measured 1.89” of sinkage in our pressure point tests. With my full body weight on the mattress, I noted a more moderate level of sinkage, especially under my butt and mid-section.

The level of sinkage is documented in the image below.

Despite the more restrained sinkage depth, the Summit creates a high level of contouring body hug. Notably, the Douglas Summit does not use any memory foam.

Even so, the foam feels essentially like memory foam (but with better cooling and faster response, which we’ll discuss later). It wraps around the body and helps to relieve the pressure with an exacting contouring hug around your unique shape.

The Douglas Summit has a very low level of motion transfer. In our tests, we measured 5.25 m/s² of acceleration range. This is 2.39 m/s² less motion than the average of 7.64 m/s² (based on all of our tests).

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

The Summit checks several critical boxes with the all foam design, 5.0” comfort layer, medium-firm feel, 12” total thickness, and poly foam that acts like memory foam.

All of these factors help it to absorb energy and prevent motion.

Looking at our motion transfer chart (which visualizes our accelerometer data) we see that the vast majority of energy is dissipated by 0.14 seconds.

This is an amazingly good performance. Both the motion duration and motion spikes are incredibly low. I have nothing but good things to say when it comes to motion transfer.

The Douglas Summit has a very fast material response. In our tests, we measured a mostly recovered response time of 0.2 seconds and a fully recovered response time of 0.4 seconds.

The fastest mattresses we’ve tested to date have a response speed of 0.2 and 0.3 seconds, respectively.

The level of responsiveness is documented in the video below.

Despite the all-foam design, thicker foam comfort layer, and poly foam that feels like memory foam, the Summit rockets back to shape nearly at the same speed as latex foam and coils. The faster response will help to prevent any type of stuck feeling on the mattress.

The Douglas Summit has a low level of bounce. In our tests, we measured a total bounce height of 6.23”.

This is notably less bounce than the average of 9.71”. While the all-foam design is great when it comes to reducing motion and creating excellent pressure relief, it also limits bounce.

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

This lower level of bounce makes sex worse and could cause some sleepers to have greater difficulty in moving around on the mattress. 

The Douglas Summit mattress has excellent edge support for both sitting and lying. In our sitting edge support tests, we measured 2.75” of sitting sinkage compression. This is 1.65” less sinkage than the average of 4.40”.

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

Mattresses with less sitting sinkage are more supportive for sitting, sleeping, and amorous activities. I felt fully supported by the Summit even when sitting directly on the edge.

Typically I hope for 4.0″ of sitting sinkage or less. The Summit easily exceeds that mark.

Lying edge support is equally as impressive. The mattress did a great job at supporting my weight in all sleeping positions, even when at the absolute edge.

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

Our sex rating formula looks at 5 different factors weighted based on their importance.

All factors are not equal in terms of significance, but each plays an important role.

Three of the most important factors are listed below with the associated testing scores:

In addition to the factors above, there are two other we consider as well, including pressure relief and cooling.

Here’s a look at the breakdown of how these 3 factors rank within the full formula:

We use the scores from all factors, plugged into the formula above, to derive a sex score for each mattress.

Sex Factor	Factor Weight	Score	Rating
Bounce	65%	6.4	Low
Edge Support	20%	10	Outstanding
Noise	5%	10	Minimal
Pressure Relief	5%	10	Outstanding
Cooling	5%	9.0	Excellent

This is a fair score, but not really that great. Bounce is low and although bounce is a preferential factor in most cases, concerning sex, we want to see a higher bounce. This helps to create a surface that is active and engaging.

Bounce makes up 60% of the score. Edge support is the next most important factor making up 20% of the score.

The edge support on the Summit is exceptional, which helps to boost the score.

Noise, pressure relief, and cooling all had solid performance as well.

Pressure relief on the Douglas Summit is outstanding. The mattress does an amazingly good job of creating pressure relief and body contouring, while still remaining fully supportive.

The Summit creates a more notable body contouring hug. It’s quite similar to the feel of memory foam, however, the cooling and response performance was notably better than more traditional memory foam.

With 5” of comfort material the mattress has ample foam to create comfort and transitional support for sleepers. I believe most sleepers will find the pressure relief to be excellent on the Summit mattress.

Off-gassing on the Douglas Summit was pretty standard—strong smell initially out of the box.

The smell gradually dissipates over the course of a few days and by day 5, the odor was completely gone.

To help a mattress off-gas faster, leave the mattress in a well-ventilated room and without any bedding or other sheets. Add a fan or air purifier to maximize airflow.

The Douglas Summit mattress is manufactured by GoodMorning.com, who also produces a number of other mattresses including Full Moon, Logan & Cove, and Novosbed.

Company Factor	Factor Weight	Score	Data
Trial Period	15%	10	365 nights
Warranty	10%	8.0	20 years
Shipping	5%	10	$0
Returns	20%	10	$0
Trust	50%	9.0	Excellent
Country of Origin	0%		Canada

The mattress comes with a 365-night trial period and a 20-year warranty. Both shipping and returns are free (if the mattress ends up not working out).

The Douglas Summit mattress is a 6 out of 10 on the firmness scale. This is a medium firm feel and is suitable for a wide range of sleepers.

The Douglas Summit has excellent support. In our tests, I felt fully supported in all sleeping positions. The material design checks all the boxes that I look for.

With 5” of comfort foam and 7” of support foam, there is ample material to create proper pressure relief, transitional support, and deep compression support.

The mattress does a great job at creating full and complete support, without having so much pushback as to create pressure point issues. Overall, I had a fantastic support experience on the Summit.

Based on this subjective assessment, the Douglas Summit would be supportive for all sleeper profiles noted below:

Sleeper Weight	Stomach Sleepers	Side Sleepers	Back Sleepers
Under 150 lbs.	Yes	Yes	Yes
150-250 lbs.	Yes	Yes	Yes
250-300 lbs.	Yes	Yes	Yes

Design

The Douglas Summit mattress is an all-foam mattress with a 12″ profile and a medium firm feel (6 out of 10 on the firmness scale).

Materials

Within the 12″ profile, there are three primary layers on the Douglas Summit mattress. From top to bottom, these layers include:

• 2.5” gel foam
• 2.5” poly foam (Elastex)
• 7.0” support foam

The Cover

The cover of the Douglas Summit mattress is designed for cooling, breathability, and elasticity, made of special cooling nanofibers and Infinitex sustainable thread.

It is machine-washable and zips right off the mattress for easy maintenance.

The Comfort Layer

The comfort layer is 5″ thick and includes two layers of foam. The top layer is a 2.5″ thick gel foam. This layer serves as the initial comfort layer with contour and hug.

Below this foam is a transitional 2.5″ poly foam layer. This foam is slightly denser than the above foam and helps with pressure relief as well as easing into the support layer below.

Heavier sleepers will engage with this transitional foam more than lightweight sleepers will.

The Support Layer

The bottom layer of the Douglas Summit is strictly for support. It has a profile height of 7.0″ and is designed for exclusive support for the layers above.

Product Evolution

The Douglas Summit launched at the end of 2022 and has undergone no notable design changes since its release.

How is the Douglas Summit Different?

The Douglas Summit is a high-quality Canadian mattress. According to NapLab data, the average price for a Canadian mattress is $1155 CAD for a queen. At $1299 CAD, the Summit is slightly beyond that average.

That being said the Douglas Summit’s score of 9.35 is above the average score of all foam mattresses we’ve tested (8.43).

This puts the Douglas Summit in the top 1% of all foam mattresses we’ve tested to date.

The runner-up to the Douglas Summit is the Original Douglas with a score of 9.02.

Other Mattresses to Consider

Not sure if the Summit is the right pick for you? Check out these three other top-rated Canadian mattresses for alternative options.

Frequently Asked Questions

Still have questions? Check out some of the top FAQs on the Douglas Summit mattress below and get the answers you’re looking for.