1/7/2025 Update – iSense Select has been removed from iSense’s website and is seemingly now discontinued (though they have yet to officially confirm that).

Best For
- Good pressure relief for a wide range of sleepers
- Very fast material response time
- Sleepers with changing firmness preferences and/or couples with different firmness preferences
Considerations
- More motion transfer than average
- Good, but not great edge support
- More expensive than the average hybrid mattress
Our Verdict
The iSense Select mattress is an 11.5″ hybrid mattress that uses a mix of poly foam, convoluted poly foam, and support coils to provide support and comfort.
This mattress has moderate level of sinkage and very high levels of bounce (we tested the medium version). This can be advantageous for side sleepers, but may cause concern for lighter sleepers. I would recommend the firmer version for back or stomach sleepers.
The Select mattress is available in three firmness levels—Plush (4), Medium (5.5), and Firm (7). What makes the iSense Select special is every mattress includes 3 different coil units, allowing you to create a soft, medium, or firm feel. If you find your firmness preferences change from time to time and/or you’re a couple with different firmness preferences, the ability to adjust the firmness on each side of the mattress is incredibly value.
In our performance tests, the iSense Select performed better than average with an overall score of 9.19.
This mattress also has a higher price tag than average. While the price point is higher, the iSense Select has a fairly rare feature with an internal firmness split option. This allows partners to each get their preferred firmnesses on their side of the mattress with Queen, King, and Cal King sizes.
Type: Adjustable
Firmness: Soft (4), Medium (5.5), Slightly Firm (7)
Best For: All Sleeping Positions, All Body Weights
In This Review
Performance Tests | Firmness | Support & Sleeping Positions | Design | Materials | Comparisons | FAQs
Testing Notes
The iSense Select offers internal split firmness for some sizes including Queen, King, and Cal. King. Depending on your preference, the mattress uses a different firmness coil unit—plush, medium or firm.
Each iSense Select mattress will arrive with medium coils on both sides, with an additional one set of plush coils and one set of firm coils in the box. You are able to open up the mattress with a zipper, which gives you access to the coils, which you can switch out to achieve your preferred feel. If it turns out that both partners like the plush (or firm) coils, iSense can send you an additional set of those coils to achieve that feel for both sides.
Our tests are based on the medium firmness coils. However, we also tested the plush and firm coils for sinkage and firmness.
Performance Tests
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 | iSense Select | Average |
---|---|---|
Overall Score | 9.19 | 8.61 |
Price (Queen) | $1,699 | $2,275 (Adjustable only) |
Cooling – Score | 9.0 | 8.7 |
Sinkage – Depth | 2.02″ | 2.13″ |
Sinkage – Feel | Moderate | Moderate |
Motion Transfer – Score | 8.6 | 8.2 |
Motion Transfer – Acceleration | 8.19 m/s² | 8.62 m/s² |
Response Time – Score | 9.9 | 9.0 |
Response Time – Mostly Recovered | 0.2 sec. | 0.4 sec. |
Response Time – Fully Recovered | 0.4 sec. | 0.9 sec. |
Bounce – Height | 12.64″ | 9.51″ |
Bounce – Feel | Very High | Moderate |
Edge Support – Score | 8.6 | 8.6 |
Edge Support – Sitting | 4.50″ | 4.04″ |
Edge Support – Lying | Excellent | Good |
Sex – Score | 9.6 | 8.5 |
Pressure Relief – Score | 10 | 8.8 |
Comfort Layer Thickness | 4.0″ | 4.1″ |
Mattress Thickness | 11.5″ | 12.0″ |
Off-Gassing – Score | 8.1 | 8.3 |
Off-Gassing – Smell | Strong | Strong |
Off-Gassing – Days | 7 days | 6 days |
Company – Score | 8.8 | 8.7 |
Trial | 180 nights | 174 nights |
Warranty | 10 years | 23% have lifetime warranties, average of other 77% of mattresses is 13 years |
How is iSense Select Different?
The iSense Select has higher performance than average and a price that is also higher than average.
Advantages
Advantages of the iSense Select include better-than-average cooling performance, fast material response time, good sex score, and a slightly longer trial period than average.
In addition, the iSense Select includes different swappable support coil units. This allows you to adjust the firmness from soft, medium, and firm on each side of the mattress (for Queen, King, and Cal King sizes).

This can be beneficial if you’re unsure of your preferred firmness, find that your preferences change, and/or you and your partner have different firmness needs.
Neutral Factors
This mattress has slightly less sinkage than average with a more dramatic body contouring hug. Having multiple firmness options does help to get sleepers of all sleeping positions and body weights the right type of support.
Bounce is another neutral factor that can swing either way. With the iSense Select, bounce is 30% higher than the average hybrid. If you like bounce, this is a pro, but if not, this could be a con.
Disadvantages
Disadvantages include below-average edge support, a longer off-gassing period, and a shorter-than-average warranty period.

Cooling Test
Cooling performance on the iSense Select was excellent. During our tests, I did not feel any significant level of heat retention around my body.
Baseline Temp.
78.6° F
Max Temp.
91.1° F
Ending Temp.
83.5° F
Max Temp.

Ending Temp

- 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 mattress seems to breathe well and doesn’t retain much heat. The mattress is equipped with a 4.0” poly foam comfort layer (that feels like modern memory foam) that sits atop a 6.0” coil unit.
Having a coil unit support layer as opposed to more foam helps with cooling, as it is one less layer that heat could be more easily retained within. The top 2.0” layer of foam in particular is impressive. It has an airy, open-cell design that breathes well.
In our objective temperature testing, we measured a max surface level temperature of 91.1° F. After getting off the mattress from minutes 0 to 1 the temperature declined by 5.1°, which is 0.49° F cooler than average.
Heat Dissipation Over Time

From minutes 0 to 5 that decline was 7.6°, which is 0.39° cooler than average. Overall, I was pleased with the level of cooling performance.
Sinkage Test
The iSense Select has an moderate level of sinkage. In our pressure point sinkage tests on the medium firmness version, the mattress had 2.02” of sinkage, which is 0.14” less sinkage than the average of 2.16”.
Sinkage Depth
2.02″
Sinkage Feel
Moderate
We also tested the firm and plush versions. The firm version had 2.06” of sinkage, while the plush version had 2.37”.
The level of sinkage is documented in the image below.
The medium version creates a dramatic body contouring, but also one that’s not overly enveloping. The foams are highly responsive, so it’s still easy to move around and change positions. However, the foams do notably wrap around the body.

The firm version is not dramatically different from the medium in terms of how the foams wrap around the body. The only difference is there is an underlying firmness that creates a little more pushback. Notably, the level of sinkage is essentially the same as what we tested on the medium version.

The plush version is more significant. My butt and midsection in particular sink further down. This type of dramatic sinkage depth is really only suited to the needs of side sleepers. Even so, the sinkage depth is fairly restrained at 2.37″.

Motion Transfer Test
The iSense Select has a low level of motion transfer. In our tests, we measured a total acceleration range of 8.19 m/s². This is 0.5% less motion than the average of 8.62 m/s².
Max. Acceleration
3.81 m/s²
Min. Acceleration
-4.38 m/s²
Accel. Range
8.19 m/s²
The memory foam-like 2.0” top layer of foam, 4.0” total comfort layer, and pocketed coil support unit are all working together to keep motion transfer in check. The topmost foam layer in particular absorbs a great deal of energy, reducing the level of energy that moves across the mattress.
The level of motion transfer is also documented in the video below.
In our motion transfer chart, which visualizes our accelerometer data, we see the motion peaks from 0 to 0.14 seconds. Motion drops into a moderate level until 0.64 seconds and by 0.99 seconds we return to near-zero levels of energy.

Given how restrained the motion peak was I was a bit surprised at the near 1-second motion duration. Even so, this is still a low level of motion and won’t be an issue for most sleepers.
Response Test
The iSense Select 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. This is effectively instant responsiveness.
Mostly Recovered
0.2 sec.
Complete Recovery
0.4 sec.
In addition, it’s only 0.1 seconds slower than the fastest responding mattresses we’ve tested to date. The rapid material recovery ensures sleepers will never feel stuck on the mattress and it helps ensure the mattress is easier to move around.
The level of responsiveness is documented in the video below.
Overall, this is an impressive level of material response, especially for a mattress that has more of a memory foam feel.
Bounce Test
The iSense Select has a extremely high level of bounce. In our tests, we measured a total bounce range of 12.64”. This is 2.95” more bounce than the average of 9.69”.
Max. Depth
6.63″
Max. Rebound
6.01″
Total Bounce
12.64″
Max. Sinkage Depth

Max Bounce Height

The level of bounce is also documented in the video below.
Generally, mattresses with a bounce level this high also have more significant motion transfer. However, that’s not the case with the iSense, which maintained a low level of motion transfer.
A higher level of bounce is greatly beneficial for improving sex performance and ease of movement.
To be able to hit a 12.64” bounce, while also keeping motion low is both incredibly surprising and incredibly rare. The mattress has all of the benefits of high bounce, but none of the negatives.
Edge Support Test
Edge support on the iSense Select is a bit of a mixed bag. Sitting edge support is good, but not quite amazing, while lying edge support was more impressive.
Max Sinkage
4.50″
Lying Support
Excellent
In our sitting edge support tests, we measured a sitting sinkage compression of 4.5”. This is 0.41” more sinkage than the average of 4.09”. Ideally, I want to see 4.0” or less sitting sinkage. Suffice to say, we’re far from that mark.

The foam layers compress down quite easily, which creates great pressure relief, but it does not do any favors for edge support. I wouldn’t call this a material “collapse”, but it definitely leans more in that direction and many heavier-weighted bodies may call it a collapse.
The level of edge support while seated is documented in the images below.
Sitting, 140 lbs.

Sitting, 200 lbs.

While sitting edge support isn’t incredible, lying edge support is notably better. In our lying edge support tests, I felt well-supported in all sleeping positions while lying on the absolute edge of the mattress.
The level of edge support while lying is documented in the images below.
Lying on Edge, 140 lbs.

Lying on Edge, 200 lbs.

The foams do far better when body weight is more evenly distributed as opposed to compressed to a single point, as it is when sitting on the edge.
Sex Test
The iSense Select has excellent sex performance. While edge support leaves something to be desired, the high level of bounce greatly carries the sex score.

Bounce is by far the most impactful factor when it comes to the dance without pants. The iSense couples the high bounce with good enough edge support and incredibly comfortable foams, delivering a great experience overall.
Sex Factor | Factor Weight | Score | Rating |
---|---|---|---|
Bounce | 65% | 10 | Extremely High |
Edge Support | 20% | 8.1 | Good |
Noise | 5% | 10 | Minimal |
Pressure Relief | 5% | 10 | Outstanding |
Cooling | 5% | 9.0 | Excellent |
Pressure Relief Test
Pressure relief on the iSense Select is outstanding. During our tests, I felt no significant level of pressure point build-up. The mattress is incredibly comfortable.
Comfort Layer
4.0″
Support Layer
7.5″
It uses 4.0” of high-performance comfort foam on top of a robust support coil unit and support foam layer. The 4.0” comfort foam layer is a little less than the average 4.2” comfort layer, based on all of our tests to date.
Nevertheless, being a little less than average seemed to have no impact on the feel or performance.

Both foam comfort layers look and feel high quality, especially the topmost foam, which appears to be a custom foam formula with an open cell structure, high resiliency, and near-instant material response.
The mattress creates a dramatic body contouring hug without excessively holding the body in place.
It’s a rare moment that I feel so relaxed during mattress testing that I could actually fall asleep, but that’s what I experienced with the iSense.
Overall, I am exceedingly impressed with the pressure relief performance.
Off-Gassing Test
Off-gassing on the iSense Select is strong right out of the box and the odor lasted for 7 days.
Initial Smell Strength
Strong
Off-Gassing Period
7 days
The average off-gassing period of mattresses tested to date is 5 days so the iSense Select, at 7 days, is just slightly beyond that average.
Company
iSense earns a good company score with highly consumer-friendly terms and conditions.
Each mattress comes with a 180-night trial period, as well as a 10 year warranty.

The mattress is made in the US and shipping is free. If the mattress ends up not working out, returns are also free.
Company Factor | Factor Weight | Score | Data |
---|---|---|---|
Trial Period | 15% | 10 | 180 nights |
Warranty | 10% | 8.0 | 10 years |
Shipping | 5% | 10 | $0 |
Returns | 20% | 10 | $0 |
Trust | 50% | 8.0 | Good |
Country of Origin | 0% | USA |
How firm is iSense Select?
The iSense Select is available in three firmness options—plush (4), medium (5.5), and firm (7.5).

The plush version has a soft feel, 4 out of 10, and would be a good option for side sleepers looking for more contour and hug.

The medium version has a medium feel and a firmness of 5.5 out of 10. This is more of a balanced feel and would be suitable for a wide range of sleepers of all sleeping positions (depending on body weight).
However, heavier-weighted bodies may find it isn’t supportive enough for back and stomach sleepers.

The firmest version has a slightly firm feel and is a 7 out of 10 on the firmness scale. This version creates a ton of support, but still has that extremely comfortable 4.0” comfort layer. This mattress would be better for back and stomach sleepers, in addition to heavier-weighted bodies.

Support & Sleeping Positions
The iSense Select has excellent support. During our tests, I felt well-supported in all sleeping positions.
The mattress uses a 6.0” pocketed coil unit on top of a 1.5” support foam that acts as the mattress foundation. Most notably, the mattress is available in 3 different firmness levels, plush, medium, and firm.
For Queen, King, and Cal King sizes, these firmnesses can be customized to each side of the mattress.
Internal split firmnesses are still fairly rare, but an extremely valuable option, as it provides a way for couples with different needs to get the precise type of firmness that works best for their body.

In addition, the 2nd layer of foam is a special type of zoned foam that has been cut or otherwise formed with a specific zonal pattern that creates more lumbar support to create better spinal alignment.
Zoned foams like this definitely aren’t miracle workers when it comes to support, but it is a helpful part of the support equation.
When we look at the complete picture of exceptional pressure relief, customized pocketed coil firmness, and zonal foam, it’s a powerful combination that delivers excellent support.
Check out the table below to see the sleeper weights and sleeping positions that would be best suited for this mattress.
Plush Version
Sleeper Weight | Stomach Sleepers | Side Sleepers | Back Sleepers |
---|---|---|---|
Under 150 lbs. | Yes | Yes | Yes |
150-250 lbs. | Maybe | Yes | Maybe |
250-300 lbs. | No | Maybe | No |
Medium Version
Sleeper Weight | Stomach Sleepers | Side Sleepers | Back Sleepers |
---|---|---|---|
Under 150 lbs. | Yes | Yes | Yes |
150-250 lbs. | Yes | Yes | Yes |
250-300 lbs. | Maybe | Yes | Maybe |
Firm Version
Sleeper Weight | Stomach Sleepers | Side Sleepers | Back Sleepers |
---|---|---|---|
Under 150 lbs. | Yes | No | Yes |
150-250 lbs. | Yes | Maybe | Yes |
250-300 lbs. | Yes | Yes | Yes |
Design
The iSense Select is an 11.5″ hybrid that is available in three different firmness levels—plush (4), medium (5.5), or slightly firm (7).
Type
Hybrid
Thickness
11.5″
Firmness
4, 5.5, 7

Materials
This mattress has a total height of 11.5″ and is made up of a mix of foam and coils. The top two layers make up the comfort layer and the bottom two layers are support layers.
- 11.5” total height
- 2.5” poly foam
- 1.5” poly foam (undercut, convoluted foam)
- 6.0” pocketed coil
- 1.5” support foam

The Law Tag outlines the full breakdown of materials included in this mattress.
- 56% urethane foam
- 44% steel coils
- Made by isense, 424 N Cedarbrook Ave., Springfield, MO 65802
- Net Weight of Filling Material:
- Twin XL 55 lbs
- Full 72 lbs
- Queen 86 lbs
- King 109 lbs
- Cal King 109 lbs
- Made in the USA
The Cover
The cover of the iSense Select is relatively thin and breathable, with an intricate stitching pattern that provides visual interest and a tighter feel to the cover.

The Comfort Layer
The comfort layer itself includes two different types of foam. The top foam is a 2.5″ poly foam and the secondary foam is a 1.5″ poly foam.

The second foam is technically a convoluted foam, but it’s a more unusual convolution pattern, less similar to others I’ve seen in the past, and ultimately provides less contour within the cutouts.
That said, it looks like it’s probably providing some measure of zonal support due to the pattern that has been cut. I’ve heard of these types of laser / pattern-cut machines before, but this might be the first one I’ve seen used in a product.

The Support Layer
The support layer of the iSense Select primarily uses 6.0″ tall pocketed coils for support and pressure relief. There is also a 3.5″ wide edge support foam that helps to provide better edge support across the perimeter of the mattress.

Notably, every iSense Select includes multiple swappable coil units. These coil units, in soft, medium, and firm, can be swapped in / out to create different customized firmnesses on the mattress (and on each side in the Queen, King, and Cal King versions).

This is great for couples with different firmness needs.
Product Evolution
The iSelse Select is the newest addition to the iSense lineup, released in May 2024. This mattress is a standard hybrid mattress, a deviation from the adjustable iSense Premier Hybrid launched in 2019.
iSense Select vs. iSense Premier
Although the iSense Select and iSense Premier look similar on the outside, the inside has many differences to note. Check out the table below for a quick rundown of the differences between these two models.

iSense Select
Type: Adjustable |
Thickness: 11.5″ |
Firmness: Plush (4), Medium (5.5), or Slightly Firm (7) |
This is the Review. |
Overall Score: 9.19 |

iSense Premier
Type: Adjustable |
Thickness: 13.5″ |
Firmness: Soft to Slightly Firm (4.5 – 7) |
Read Review |
Overall Score: 9.17 |
Other Mattresses to Consider
Not sure if the iSense Select is the right pick for you? Check out these three other top-rated hybrid mattresses for high-performing alternatives you may want to consider.
For Performance

Winkbed
9.82 Overall Score
The Winkbed is a high-performance hybrid available in 3 different firmnesses. There is no internal split firmness, so that’s a major difference between Winkbed and iSense Select. However, it is also cheaper at $1,499 for a Queen.
For Budget

Brooklyn Bedding Signature Hybrid
8.88 Overall Score
The Signature Hybrid by Brooklyn Bedding is a fantastic value hybrid. Priced at only $999 for a queen, the Signature Hybrid offers well-rounded performance and a 4.0″ comfort layer. This mattress is also available in three firmness levels, much like the iSense Select.
For Motion Transfer

GhostBed Flex
9.15 Overall Score
The GhostBed Flex is another top-notch hybrid. This mattress is only available in a single firmness (6 out of 10) with a medium-firm feel. In our tests, the Flex had better edge support and lower levels of motion transfer, making it a strong contender against the iSense.
Frequently Asked Questions
Still have questions? Check out some of the top FAQs on the iSense Select mattress below and get the answers you’re looking for.
Here are the current prices, with any sales or promotions reflected below:
Twin XL: $1,199
Full: $1,599
Queen: $1,699
King: $2,199
Cal. King: $2,199
King FlexHead: $2,499
Split King: $2,499
Cal King FlexHead: $2,499
*Note: Sales prices are subject to change without notice or warning.