Winkbed GravityLux 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. Testing categories include:

Test	Rating
Cooling	Excellent
Sinkage	Moderate
Motion Transfer	High
Response Time	Extremely Fast
Bounce	Extremely Low
Edge Support	Exceptional
Sex	Very Good
Pressure Relief	Excellent
Off-Gassing	Excellent
Company	Excellent

Cooling performance on the Winkbed GravityLux was excellent. During our tests, I felt no significant heat retention around my body. Despite the all-foam design the mattress breathes quite well.

• 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

The Tencel cover definitely helps to improve cooling. It creates a cool-to-the-touch feel. In addition, the 2.0” of gel poly foam in the top layers further enhances cooling.

Heat Dissipation Over Time

While the mattress does use memory foam it’s only 2.0” of the total 10”. As a result, any memory foam heat retention concerns are in part managed through the material thickness itself.

Furthermore, the memory foam is within the core of the mattress, as opposed to the topmost layer.

This position helps to further prevent any type of heat retention. Looking at our objective data, we measured a maximum surface level temperature of 85.2° F.

From minutes 0 to 1 the temperature was able to drop by 4.8°, with an 8.9° decline from minutes 0 to 5. Looking at the complete picture of objective data, subjective experience, and material analysis, I am pleased with the overall cooling performance.

The Winkbed GravityLux mattress has a moderate level of sinkage. In our tests, we measured 2.06” of pressure point sinkage depth. The mattress creates a significant level of body contouring and hug.

The level of sinkage is documented in the image below.

While the poly foam layers help to balance out the total feel, it still is very much a memory foam mattress in the way that it reacts to body weight.

The mattress takes a moment to contour to the exact shape of your body. There is a noted moment where I feel the entire body sinking more deeply into the mattress.

Notably, heavier parts of the body (butt, midsection, hips) will sink deeper into the mattress and experience a more dramatic contouring hug.

The Winkbed GravityLux has a high level of motion transfer. In our tests, we measured 11.85 m/s² of acceleration range. This is 55% more motion transfer than the average of 7.61 m/s².

The 10” foam design, medium-firm feel, and relatively thin memory foam layer (just 2.0” and positioned in the core) all contributed to a higher level of motion.

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

Normally, all foam mattresses and mattresses with memory foam are able to absorb and disperse energy better than many other mattress types. However, here we recorded a higher level of motion.

I didn’t expect this mattress to deliver perfect motion, but did expect better than this.

Looking at our motion transfer chart, which visualizes our accelerometer data, we see the highest levels of motion from 0 to 0.21 seconds. Motion drops dramatically thereafter and by 0.71 seconds it has returned to near-zero levels.

While the motion intensity leaves something to be desired, motion duration was excellent. The vast majority of all energy is dissipated by 0.21 seconds. Mattresses with the very least motion transfer are able to return to near-zero energy levels by 0.3 seconds.

Winkbed’s GravityLux isn’t quite to that level. More sensitive sleepers may find the energy spikes, even as brief as they are, to be too high, however, many sleepers should not be bothered by them.

The Winkbed GravityLux has an extremely fast material response time. In our tests, we measured a mostly recovered response time of 0.2 seconds and a fully recovered response time of 0.6 seconds.

This is considerably faster than the average in both categories. Based on all of our tests to date, we have measured an average mostly recovered time of 0.46 seconds and an average fully recovered response time of 0.90 seconds.

The level of responsiveness is documented in the video below.

Usually, memory foam is a slower-responding material. However, here we don’t see that. Having a top layer of responsive poly foam ensures that the mattress springs back to shape quite quickly.

Placing the 2.0” memory foam layer in the core, as opposed to on top, also helps. The recovery speed is not as instant as latex or mattresses with a 100% responsive poly foam comfort layer.

However, it’s still more than fast enough for the vast majority of sleepers. I never felt stuck on the mattress and it is able to respond to changes in movement nearly instantly.

The Winkbed GravityLux has an extremely low level of bounce. In our tests, we measured just 3.83” of total bounce height. This is 5.93” less bounce than the average of 9.76”.

All foam mattresses typically have less bounce. As do mattresses with memory foam. The GravityLux is both of those things.

As a result, the low bounce isn’t surprising. Even so, this is extremely low. In general, I like to see 8-12” of total bounce height. Bounce in this range helps make it easier to move around on the mattress and improves sex. Having a bounce this low can put a damper on both of those.

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

All that said, bounce is a preferential factor. The fact the bounce is this low isn’t necessarily bad. However, you definitely should be aware of it and have a general desire for a mattress with less bounce. The GravityLux has the 3rd least bounce among all mattresses we’ve tested to date.

Edge support on the Winkbed GravityLux was truly exceptional. In our sitting sinkage tests, we measured 2.5” of sitting sinkage. This is 1.91” less sinkage than the average of 4.41”.

This sinkage depth creates a more robust and fully supportive edge for sitting, sleeping, and amorous activities. This is pretty rare in an all-foam mattress, more rare in a memory foam mattress, and rarer yet in a 10” mattress.

Despite the material limitations, the mattress performed great with respect to edge support. Lying edge support was equally as impressive. Even when lying directly on the edge of the mattress I felt incredibly well-supported. I have absolutely zero complaints when it comes to edge support.

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

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
Bounce	60%	8.5
Edge Support	20%	10
Noise	10%	10
Pressure Relief	5%	9.5
Cooling	5%	9.5

For the Winkbed GravityLux, these individual factors generated a sex score of 9.1.

Bounce is the only thing that really is holding this mattress back. It has a very low level of bounce, which can make sex more difficult, but honestly, this is fairly common for memory foam.

If you want the memory foam feel / all foam design then less bounce and worse sex is just part of the equation (regardless of the specific mattress brand you’re looking at).

Pressure relief on the Winkbed GravityLux is excellent. In our tests, I felt ample pressure relief in all sleeping positions. The GravityLux has a thick 4.0” comfort layer. 1” of the comfort layer is quilted within the cover itself.

Quilted covers are ideal at providing immediate pressure relief, while the additional 3.0” of comfort foam creates transitional and deep compression comfort.

While the mattress absolutely has more of a memory foam feel, having the memory foam within the core does help to more restrain how dramatically the foam would otherwise contour to the body.

This creates a more balanced memory foam feel, which in my view, enhances the pressure relief dynamic. 

Right out of the box, the Winkbed GravityLux has a strong smell. It smelled for 3 days before the off-gassing process was complete. This off-gassing period is about average.

Winkbed mattresses have a long 120-night trial period with free shipping and a lifetime warranty.

Company Factor
Trial Period	120 nights
Warranty	Lifetime
Shipping	Free
Returns	Free
Country of Origin	USA

The warranty is a full replacement program that will send you a new mattress if yours fails to perform at an acceptable level. The company also offers free returns if things don’t work out.

The Winkbed GravityLux mattress is available in three firmness levels—soft, medium, and firm. In this review, we tested the medium, which was a 6 out of 10 on the firmness scale.

I am estimating the soft to be around a 4 out of 10 and the firm to be an 8 out of 10.

Not sure which firmness is right for you? In general, side sleepers prefer a softer feel than back or stomach sleepers. Also, lighter sleepers generally prefer a softer feel than heavier-weighted sleepers.

Considering these two factors (body weight and sleeping position) are two great ways to help select the right firmness for you.

Winkbed GravityLux Soft

The Soft GravityLux would be a good option for lightweight or moderate-weighted side sleepers. The extra softness should provide a deeper hug and contour than firmer options.

Winkbed GravityLux Medium

The Medium GravityLux offers a balanced feel, suitable for a wider range of sleeping positions and sleeper weights. If you’re looking for a mattress with the widest appeal, the Medium is a solid pick.

Winkbed GravityLux Firm

The Firm GravityLux is a better pick for back or stomach sleepers as well as sleepers who are heavier. Heavier sleepers oftentimes require a firmer mattress for optimal pressure relief and support.

The Winkbed GravityLux mattress has excellent support. During our tests, I felt well-supported in all sleeping positions. The mattress has a proven material layer design with 4.0” of comfort material on top of 6.0” of support foam.

GravityLux is available in 3 firmnesses, making it appropriate for a wider range of body types and sleeping positions. My only concern is for very heavy weighted sleepers, especially 300+ pounds.

At 10” thick the mattress is appropriate for sleepers up to 250 pounds. However, beyond 250 pounds it gets progressively worse. I would not feel confident recommending this (or most any 10” mattress) to sleepers who weigh more than 300 pounds.

The tables below outline our specific recommendations for each available mattress firmness.

Winkbed GravityLux Soft

Sleeper Weight	Stomach Sleeper	Side Sleeper	Back Sleeper
Under 150 lbs.	Yes	Yes	Yes
150-225 lbs.	Maybe	Yes	Maybe
225-300 lbs.	No	Maybe	No

Winkbed GravityLux Medium

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

Winkbed GravityLux Firm

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

Design

The GravityLux mattress is a modern memory foam mattress with a 10″ profile. This mattress is available in three different firmness levels—soft, medium, or firm.

It is designed to offer a memory foam feel, without the common disadvantages that can often be associated with traditional memory foam.

Materials

The GravityLux consists of four layers of material, wrapped within a 1.0″ quilted cover. From top to bottom, the layers include:

• 1.0″ quilted cover
• 1.0″ get foam
• 2.0″ memory foam
• 2.0″ poly foam

The Cover

As mentioned above, the GravityLux has a quilted cover. It is made of Tencel with gel-infused foam on the inside and a tufted finish on the outside. This gives the mattress a plush look and feel while also limiting heat retention and helping you stay cool throughout the night.

The Comfort Layer

Below the cover is a double-layer comfort layer made of a 1.0″ layer of gel foam and a 2.0″ layer of memory foam.

A 3.0″ thick comfort layer is pretty good for a 10″ thick mattress and I found it to be very comfortable during our tests.

The Support Layer

The comfort l layer consists of two layers of foam. There is a 2.0″ thick poly foam followed by a 4.0″ thick high-density support foam.

Product Evolution

The Winkbed GravityLux mattress was released in 2019, available in the same firmness levels that are available today. Since its release, there have been no major design changes.

How is the GravityLux Different?

The Winkbed GravityLux mattress is a 10″ high memory foam mattress… a pretty common style on the mattress market. So what helps the GravityLux stand out against the competition?

#1. Three Firmness Options

The GravityLux is available in three firmness levels—soft, medium, and firm. This provides a wide range of softness to accommodate different sleeper profiles.

#2. Modern Memory Foam

Traditional memory foam has a tendency to retain heat and / or leave sleepers feeling stuck in unresponsive material layers.

The GravityLux combats these disadvantages to traditional memory foam by adding a Tencel cover, gel-infused quilted top layer, and balancing poly foam with memory foam.

The result is a mattress that has the contour of memory foam, but also a fast response time and limited heat retention.

Other Mattresses to Consider

Not sure if the Winkbed GravityLux is the right pick for you? Check out these three other top-rated memory foam alternatives.

Frequently Asked Questions

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