Casper Cooling Select Hybrid 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	Casper Cooling Select Hybrid	Average
Overall Score	8.63	8.61
Price (Queen)	$799	$1,347 (Hybrid only)
Cooling – Score	9.0	8.7
Sinkage – Depth	1.89″	2.13″
Sinkage – Feel	Minimal	Moderate
Motion Transfer – Score	9.4	8.2
Motion Transfer – Acceleration	6.39 m/s²	8.70 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	8.78″	9.66″
Bounce – Feel	Moderate	Moderate
Edge Support – Score	8.2	8.6
Edge Support – Sitting	3.50″	4.02″
Edge Support – Lying	Fair	Good
Sex – Score	8.4	8.5
Pressure Relief – Score	8.0	8.7
Comfort Layer Thickness	4.5″	4.1″
Mattress Thickness	11.75″	12.0″
Off-Gassing – Score	5.8	8.3
Off-Gassing – Smell	Strong	Strong
Off-Gassing – Days	15 days	6 days
Company – Score	8.8	8.6
Trial	365 nights	175 nights
Warranty	10 years	23% have lifetime warranties, average of other 77% of mattresses is 13 years

How is Casper Cooling Select Different?

The Casper Cooling Select is an 11.75″ hybrid mattress with an overall performance that is just marginally better than average and a price tag that is significantly less than average—40% less than the average hybrid mattress.

Advantages

Besides the low price, other advantages of the Casper Cooling Select include better cooling performance, lower levels of motion transfer, faster material response time, and a slightly thicker comfort layer.

Neutral Factors

This mattress has minimal sinkage and a moderate level of bounce. Both bounce and sinkage are considered neutral factors as different sleepers may have different preferences in these areas.

Disadvantages

Disadvantages of the Casper Cooling Select Hybrid include a lack of edge support, especially when lying directly on the edge of the mattress. This lack of edge support also negatively affects the sex score.

The comfort layer is slightly thicker than average, but we see the consequences of worse material quality in the lack of pressure relief. While this may not be an issue for lighter weighted sleepers, I would recommend a different mattress for sleepers over 250 lbs.

The Casper Cooling Select Hybrid has excellent cooling performance. During 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

The combination of thin knit cover and hybrid design are all working together to keep the mattress cooler. The thin, non-quilted cover helps create airflow in and out of the mattress.

In addition, the layer of pocketed support coils creates more airflow and is simply less material in which heat could be retained.

In our objective temperature testing, we measured a max surface level temperature of 87.8° F, which is 1.8° cooler than the average of 89.6°.

Heat Dissipation Over Time

The mattress breathed well, avoided notable heat retention, and remained comfortably cool during our testing. I expect most sleepers will find this level of cooling performance to be more than sufficient. 

The Casper Cooling Select Hybrid has a minimal level of sinkage. During our tests, we measured 1.89” of pressure point sinkage. This is 0.23” less sinkage than the average of 2.12”.

The level of sinkage is documented in the image below.

The mattress creates more of a floating feel where the body lies on “top” of the mattress, as opposed to sinking down “in” the mattress.

What sinkage there is is more generalized around the body, as opposed to creating the exacting and dramatic body contouring hug that memory foam mattresses are known for.

The Casper Cooling Select Hybrid has a very low level of motion transfer. During our test, we measured 6.39 m/s² of acceleration range. This is 27% less motion than the average of 8.73 m/s².

With 4.5” of comfort foam, pocketed coils, and a loose-knit cover, the mattress has the right material conditions to mitigate motion transfer.

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

In our motion transfer chart, which visualizes our accelerometer data, we can see the highest motion from 0 to 0.23 seconds. Motion drops rapidly thereafter and by 0.67 seconds we’ve returned to near-zero levels of motion.

Motion peaks, valleys, and duration are all kept to reasonable, well-restrained levels. I expect most sleepers will find the level of motion to be perfectly acceptable. 

The Casper Cooling Select Hybrid has a very fast material response. During our mostly recovered test, we measured a recovery speed of 0.2 seconds. This is 0.21 seconds faster than the average mostly recovered speed of 0.41 seconds.

The level of responsiveness is documented in the video below.

During our fully recovered response, we measured a responsiveness speed of 0.4 seconds, which is 0.49 seconds faster than the average of 0.89 seconds.

At 0.2 and 0.4 seconds to recover, this is nearly tied with the fastest responsiveness mattresses, which are 0.2 (mostly recovered) and 0.3 seconds (full recovery) to recover back to shape.

Suffice to say, at these responsiveness speeds the mattress rebounds back to shape effectively instantly. This recovery speed ensures you’ll never feel stuck on the mattress and it’s easy to move around on.

The Casper Cooling Select Hybrid has a moderate level of bounce. During our tests, we measured a total bounce height of 8.78”. This is 0.89” less bounce than the average of 9.67”. Ideally, I like to see 8-12” of total bounce height.

Mattresses within this range are able to better mitigate motion transfer, while still having enough bounce for ease of movement and improving sex performance. The Cooling Select Hybrid is on the low end of my ideal range, but still within it.

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

While more bounce would have undoubtedly improved amorous activities, it also would have likely increased motion. I expect most sleepers will find this level of bounce to be sufficient. 

The Casper Cooling Select Hybrid has a good level of edge support, but it certainly doesn’t rise to the “excellent” or “outstanding” level.

In our sitting edge support tests, we measured a sitting sinkage compression of 3.5”. This is 0.52” less sitting compression than the average of 4.02”.

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

However, the cover is quite slippery. As a result, I found myself sort of sliding off while sitting too near the edge. Lying edge support was also a bit disappointing and I found the performance to be fair at best.

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

While lying directly on the edge of the mattress I did not feel tremendously well supported in any sleeping position. The mattress uses a perimeter edge support foam, which is definitely helping. However, it just isn’t enough, in my view.

The edge feels squishy while lying directly on it. This is most likely a product of the thicker-than-average 4.5” comfort layer.

This extra comfort material is great for pressure relief and comfort but doesn’t do the mattress any favors concerning lying edge support.

The Casper Cooling Select Hybrid has good sex performance, but it’s also far from great. Its best attributes were the minimal noise, reasonably good sitting edge support, and excellent cooling.

From there, we have a middling performance from pressure relief and bounce.

Sex Factor	Factor Weight	Score	Rating
Bounce	65%	8.0	High
Edge Support	20%	9.4	Excellent
Noise	5%	10	Minimal
Pressure Relief	5%	8.0	Good
Cooling	5%	9.0	Excellent

Unfortunately, with just 8.78” of bounce it’s just not enough to push the Casper to the greatest levels of amorous activities.

The lower-than-average bounce greatly facilitates lower motion, but it’s also the primary reason for the weaker sex performance.

The Casper Cooling Select Hybrid has a good level of pressure relief performance. However, it fails to rise to the “excellent” or “outstanding” level. During our tests, I did not feel any significant level of pressure points.

That said, I did feel that the comfort dynamic was lacking. The mattress is equipped with 4.5” of comfort material, which is 0.4” thicker than the average comfort layer thickness of 4.1”, based on all of our tests to date.

Having more comfort material is great to see and is definitely helping to improve the pressure relief dynamic.

Nevertheless, the quality of these foam layers just isn’t at the same level as many mattresses we’ve tested with a better pressure relief dynamic.

The mattress creates more of a floating feel. What body contouring hug there is is more generalized and just feels sort of “flat” to lie on.

When I compare this to Casper’s Dream Max and Casper Snow mattresses there is a significant difference in the experience.

All that said, given the price point, it’s hard to complain too much. For most sleepers, the pressure relief performance will be sufficient. 

Pressure Map – Side Sleepers

Pressure Relief (PSI)	Average	Maximum
Side Sleepers	0.2	1.39

Pressure Map – Back Sleepers

Pressure Relief (PSI)	Average	Maximum
Back Sleepers	0.13	0.87

Pressure Map – Stomach Sleepers

Pressure Relief (PSI)	Average	Maximum
Stomach Sleepers	0.14	1.06

Off-gassing on the Casper Cooling Select Hybrid is strong right out of the box. The odors took over 2 weeks to fully dissipate—a total of 15 days. Compared to the average off-gassing duration (6 days) this performance is 2.5 times slower than average.

For sleepers who are sensitive to strong odors, this could be an issue worth considering. That being said, once the mattress has fully off-gassed it shouldn’t be a factor that continues to negatively impact the mattress.

Although this is a Casper mattress, it is sold through Costco and the Costo terms and conditions apply. Costo backs the Casper mattress with a 365-night trial period and a 10-year warranty.

Shipping and returns are both free if the mattress ends up not working out for your needs.

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%	8.0	Good
Country of Origin	0%		USA

The Casper Cooling Select Hybrid is available in a single firmness, 6 out of 10, which gives the mattress a medium-firm feel.

The Casper Cooling Select Hybrid has a good level of support. As with pressure relief, it’s good, but far from great. It certainly doesn’t rise to the “excellent” or “outstanding” level of support.

During our tests, I felt reasonably well-supported. However, the materials of the mattress don’t give me great confidence in the mattress’s ability to support heavier-weighted bodies.

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.	Yes	Yes	Yes
150-250 lbs.	Yes	Yes	Yes
250-300 lbs.	Maybe	Maybe	Maybe

The Cooling Select Hybrid is equipped with a 7.25” support layer. This is notably thinner than the average support layer thickness of 7.9”, based on all of our tests to date. In addition, the Select Hybrid uses a zoned foam support layer.

However, I don’t feel like this zoned layer is having a significant impact on support performance. The mattress creates a generalized body compression (as opposed to an exact body contouring hug that you would get with more typical memory foam).

This type of support dynamic can be fine, provided you like the feel and provided the mattress has a more robust support layer. In my view, the coil layer just doesn’t feel particularly high quality.

For sleepers over 250 pounds, I would recommend going with a different mattress (Casper Dream would be a good step up). All that said, given the price point, this level of performance is not unexpected or unreasonable.

Design

The Casper Cooling Select is an 11.75″ hybrid (12″ according to Casper and Costco) with a medium-firm feel. This mattress is designed to be the Costo-exclusive hybrid choice for sleepers who want a budget-friendly Casper hybrid.

Materials

This mattress is made up of five different layers. The top three layers are for comfort and transitional support while the bottom two layers are strictly for foundational support. From top to bottom, the layers include the following.

• 1.5” poly foam
• 1.5” memory foam
• 1.5” poly foam
• 5.75” pocketed coils
• 1.5” support foam

The Cover

The cover of this mattress is a knit cover with cooling properties. It is thin and breathable with a dark gray binding and reinforced side panels.

The Comfort Layer

Beneath the cover and the fire sock are three layers of foam. The top is a 1.5″ poly foam (gray) followed by a 1.5″ memory foam (blue).

The third foam is a 1.5″ poly foam (teal) that functions more as a transitional foam between the comfort layers and the support layer at the base.

The third layer of foam (teal) is a zoned layer which uses a denser, more supportive foam at the central core of the mattress. This helps to maintain spinal alignment when lying on the mattress.

The Support Layer

The support layer contains a 5.75″ layer of pocketed coils, which is thinner than many other coil-based mattresses. Oftentimes a 12″ hybrid will have anywhere between 6-8″ of coils. It is pretty rare that we ever see less than 6″ of coils.

Below the coils is a 1.5″ high-density support foam at the base of the mattress. This helps provide a strong foundational base for the mattress.

A dense foam is also used along the perimeter of the mattress, which is designed to improve edge support and also limit noise and motion transfer from the coils.

Product Evolution

The Casper Cooling Select Hybrid is a Costco-exclusive mattress. It is new to the Costco lineup as of 2024, when Casper relaunched their entire collection of mattresses.

The Cooling Select Hybrid replaced earlier versions of Casper Costco mattresses, which included:

• Casper Select
• Casper Select Hybrid

Currently, the Casper Cooling Select Hybrid and Casper Cooling Select Memory Foam are the only Casper mattresses available from Costco.

Other Mattresses to Consider

Not sure if the Casper Cooling Select is the right pick for you? Check out these three other top-rated budget-friendly hybrid mattresses you may want to consider.

Frequently Asked Questions

Still have questions? Check out some of the top FAQs on the Casper Cooling Select Hybrid mattress below and get the answers you’re looking for.

Disclosure – Derek Hales has a history with Casper that some may view as relevant to his reviews of Casper products. In 2016, Casper Sleep sued Derek Hales in federal court over his reviews of its products. In 2017, the lawsuit ended with a settlement. See here for more information.