Leesa Oasis Chill 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	Exceptional
Sinkage	Moderate
Motion Transfer	Moderate
Response Time	Extremely Fast
Bounce	Moderate
Edge Support	Excellent
Sex	Excellent
Pressure Relief	Excellent
Off-Gassing	Very Good
Company	Excellent

How is Leesa Oasis Chill Different?

The Leesa Oasis Chill hybrid has higher performance than average while having a price that is also slightly higher than average—4.3% higher than the average hybrid mattress.

Advantages

Advantages of the Oasis Chill include higher cooling performance, faster material response time, better edge support, a thicker mattress profile (13.5″ compared to 11.9″ average), and a thicker comfort layer (4.8″ compared to the 4.2″ average).

Neutral Factors

The mattress has just slightly deeper sinkage than average (0.02″), although quite negligible. Bounce levels are 6% lower than average as well. Both sinkage and bounce are at reasonable levels and are more preferential factors than anything else.

Disadvantages

Disadvantages of the Leesa Oasis Chill include 11% higher levels of motion transfer than the average mattress as well as a shorter mattress trial period (by 64 nights, compared to the 164 night average).

Factor	Leesa Oasis Chill	Average
Overall	9.72	9.52
Price	$1,399	$1,341 (Hybrid only)
Cooling	10	9.4
Max Sinkage	2.19″	2.17″
Total Motion Transfer	9.32 m/s²	8.39 m/s²
Response Time	0.3 sec.	0.4 sec.
Total Bounce	9.07″	9.64″
Edge Support – Sitting Sinkage	3.25″	4.13″
Mattress Thickness	13.5″	11.9″
Sex Overall	9.8	9.6
Comfort Material	4.8″	4.2″
Off-Gassing – Smell	Strong	Strong
Off-Gassing – Days	10 days	5 days
Trial	100 nights	164 nights
Warranty	10 years	27% have lifetime warranties, average of other 73% of mattresses is 14 years

The Leesa Oasis Chill has exceptionally good cooling. In our tests, it not only did not retain significant heat but had a notable cooling feel to the cover. The mattress uses a layer of pocketed coils that bring ample airflow into the 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

In addition, we have a copper-infused memory foam that further helps to manage heat retention. However, arguably the most significant factor in cooling performance is the cooling cover. According to Leesa, the cover is “Infused with cooling fibers to help maintain the ideal skin temperature of 88°.”

In our tests, it didn’t quite hit that 88° mark, but it did make a notable impact. In our objective testing, we measured a max surface level temperature of 91.4° F.

After getting off the mattress the temperature dropped by 5.3° from minutes 0 to 1 (which is 0.78° cooler than average) and 8.0° from minutes 0 to 5 (which is 1.08° cooler than average).

Heat Dissipation Over Time

When we look at the complete picture of objective data, subjective experience, and material analysis I am confident that most sleepers will find the Leesa Oasis Chill to be a sufficiently cool mattress.

The Leesa Oasis Chill has a moderate level of sinkage. In our tests, we measured a pressure point sinkage depth of 2.19”. This is 0.01” more sinkage than the average of 2.18”, based on all of our tests to date.

The level of sinkage is documented in the image below.

The mattress creates a balanced level of body contouring hug. The memory foam creates a little more of a hugging sensation, but it’s restrained by the 1.75” quilted cover and 1.5” poly foam layer in the core of the mattress.

During our testing, I felt an even, moderate, and balanced hug around the body. It’s neither too much nor too little.

The Leesa Oasis Chill has a moderate level of motion transfer. In our tests, we measured a total acceleration range of 9.32 m/s². This is 11.8% more motion than the average of 8.34 m/s².

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

The thick 4.75” comfort layer helps to absorb much of the energy on the mattress, which keeps motion transfer quite restrained.

In our motion transfer chart, which visualizes our accelerometer data, we can see the highest motion spikes from 0 to 0.08 seconds. Motion declines rapidly thereafter and by 0.85 seconds we’ve returned to near-zero energy levels.

Mattresses with the lowest motion are able to disperse all energy within 0.3 seconds. The Oasis Chill is far from that mark. Even so, the bulk of the energy is dispersed by 0.64 seconds. I don’t expect motion transfer at these levels will be problematic for most sleepers.

The Leesa Oasis Chill has an extremely fast material response. In our tests, we measured a mostly recovered response time of 0.3 seconds and a fully recovered response time of 0.8 seconds.

These are 0.11 and 0.04 seconds faster than the average, respectively. While the recovery speed is fast, it’s not quite at the level of the fastest mattresses we’ve tested (which is 0.2 seconds to mostly recover).

The level of responsiveness is documented in the video below.

The copper memory foam is the layer that slows down the total mattress responsiveness speed. The coils and poly foam in the core rebound back to shape instantly. Even so, at these speeds, most sleepers will find the mattress doesn’t create a “stuck” feeling, and ease of movement is a non-issue.

The Leesa Oasis Chill has a moderate level of bounce. In our tests, we measured a total bounce height of 9.07”.

This is 0.55” less than the average bounce height of 9.62”. While the bounce is a little south of average it’s nothing I’m overly concerned with. Ideally, I like to see mattresses with 8-12” of bounce.

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

At these heights, we see all of the major benefits to ease of movement and sex, while also minimizing motion transfer. In my view, most sleepers will find this level of bounce to be perfectly acceptable.

The Leesa Oasis Chill has excellent edge support for both sitting and lying. In our sitting edge support tests, we measured a sitting sinkage compression of 3.25”. This is 0.89” less sinkage than the average of 4.14”.

Any sitting compression of 4.0” or less is great. Even when sitting directly on the edge of the mattress I felt well supported and the materials maintained their shape. Lying edge support is equally as impressive.

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

In our lying edge support tests I felt well supported in all sleeping positions. The mattress creates great support in part due to 2 rows of reinforced edge support coils.

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

These coils, in combination with the 13.5” total profile, material quality, and overall support of the coil unit in general, create ample edge support.

The best mattresses for sex have high bounce, good edge support, quiet materials, and good pressure relief and cooling.

These 5 factors make up the NapLab sex performance score.

Sex Factor	Factor Weight	Score	Rating
Bounce	60%	9.8	Moderate
Edge Support	20%	9.9	Excellent
Noise	10%	10	Minimal
Pressure Relief	5%	9.5	Excellent
Cooling	5%	10	Exceptional

For the Leesa Oasis Chill, these individual factors generated a sex score of 9.8.

This mattress has moderate levels of bounce (slightly less than average) and excellent edge support. Bounce and edge support make up 80% of the sex score and are arguably the most important factors for ideal sex performance.

This mattress is also very quiet, has excellent pressure relief, and exceptional cooling.

The Leesa Oasis Chill has excellent pressure relief. During our tests, I did not feel any significant level of pressure point build-up. The mattress did a great job at remaining comfortable and relieving pressure even during extended sessions lying in the exact same position.

The mattress uses a 4.75” comfort layer, including a 1.75” quilted cover, 1.5” memory foam, and 1.5” poly foam. This combination of materials creates an even and balanced level of body contouring, which helps create ample pressure relief.

Looking at the material thickness, types, and quality, in addition to our subjective experiences testing the mattress, I’m confident most sleepers will find the Oasis Chill to have excellent pressure relief.

Off-gassing on the Leesa Oasis Chill was strong when we initially unboxed it. The odor took 10 days to fully dissipate.

This length of time is about average and not hugely concerning.

The company score takes a look at factors that may influence your experience with the mattress.

Factors include length of the trial period, warranty, shipping / return costs, and country of origin.

Company Factor	Factor Weight	Score	Data
Trial Period	25%	9.0	100 nights
Warranty	25%	10	10 years
Shipping	25%	10	$0
Returns	25%	10	$0
Country of Origin	0%		USA

For Leesa, these individual terms and conditions generated a company score of 9.8.

Leesa offers a trial period of 100 nights, which is a bit shorter than the 164-night average for a trial period. It also comes with a 10-year warranty.

Of the 180+ mattresses we’ve tested to date, 27% have lifetime warranties. The average of the other 73% of mattresses is 14 years. Compared to this date, the Leesa warranty is shorter than average on all accounts.

The Leesa Oasis Chill is available in two firmness levels, cushion-firm and plush.

We tested the Cushion Firm, which is a 6 out of 10 with a medium-firm feel. We estimate the Plush version of this mattress to be a 4 out of 10, giving it a soft feel.

Support on the Leesa Oasis Chill Hybrid was excellent. I felt well-supported in all sleeping positions. The mattress checks all the major boxes I look for. We have a 13.5” total profile with 8.75” of support materials and a 4.75” comfort layer.

All three of these material measurements are more than the average we see (based on all of our tests to date), which are 11.9” total profile height, 7.7” support layer, and 4.2” comfort layer.

While a thicker mattress isn’t always better, in most cases it is. We see high-quality and high-performance coils, foams, and other materials at every level. The coil unit consists of 1,032 individual coils and 3 support zones.

Zoned support helps deliver more support where your body needs it, creating a more neutral spinal alignment. The material quality, in combination with the multiple firmness options, means there are a wide variety of body types and preferences, in addition to all sleeping positions, that can be well supported by the mattress.

Comfort-Firm Version

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

Plush Version

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

Design

The Leesa Oasis Chill is a 13.5″ hybrid mattress designed for great pressure relief and support, while also delivering heightened cooling performance.

It is available in two different firmness levels, Plush for a soft feel and Cushion-Firm for a medium-firm feel.

Materials

In total, there are five distinct layers. The top 3 are comfort layers and the bottom two are support layers. Here is a more detailed breakdown from top to bottom:

• 1.75″ quilted cover
• 1.50″ copper memory foam
• 1.50″ poly foam
• 8.0″ pocketed coils
• 0.75″ support foam

The Cover

The cover of this mattress is 1.75″ thick and with a quilted / tufted design. The actual fabric used on the cover is thin and breathable, but the tufted design holds the cover snugly against the core of the mattress.

The mattresses in the Leesa Chill collection all have the same quilted cover, infused with cooling fibers that are designed to improve overall cooling performance.

The sides of the cover have handles to make it easier to carry or rotate the mattress.

The Comfort Layer

Beyond the 1.75″ thickness of the quilted cover, are two layers of comfort foam. The top layer is a 1.5″ copper memory foam.

Copper-infused foams typically have better cooling performance compared to traditional foam. It is likely that this foam improves cooling on the Oasis as well.

Below the copper foam is a 1.5″ transitional poly foam. This poly foam helps transition weight from the comfort layer up top into the support layer below.

The Support Layer

The support layer is 8.0″ thick and consists of hundreds of pocketed coils. These coils are individually encased in a thin fabric, which allows each coil to move independently from each other—improving pressure relief and overall performance.

Product Evolution

The Chill line of mattresses from Leesa was launched in October 2023, which includes the Studio Chill, Oasis Chill, Sapira Chill, and Deluxe Chill.

The Chill line is essentially an improvement to the original Leesa Studio, Sapira, and Legend mattresses. The most significant difference between the Chill and original versions is the addition of the cooling cover.

Most other basic design elements and material types are consistent between the Chill and original mattress types.

Other Mattresses to Consider

Not sure if the Leesa Oasis Chill is the right pick for you? Check out these three other top-rated cooling hybrid mattresses for high-performing alternatives you may want to consider.

All of these mattresses listed below also scored perfect 10s for exceptional cooling performance.

Frequently Asked Questions

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