Our team at Sleep Foundation conducts extensive hands-on tests for each mattress to provide you with the most reliable, data-driven recommendations and reviews. Below are key guidelines that inform our testing methodology:
Our testers lie on the surface of each mattress to evaluate factors such as contouring and support. We also use specialized tools to measure performance criteria like pressure relief, heat retention, and motion isolation.
We test each mattress using various sleep positions to observe whether a mattress is better suited for side, back, or stomach sleeping. We roll around the surface and sit on the edges to gauge ease of movement and perimeter support.
We have tested hundreds of mattresses and bring years of experience in the mattress industry to the test lab. Our testing team covers a wide range of sleep preferences, sleep positions, and body types. This helps us represent as many sleeper types as possible in our reviews.
Leesa Sleep is an Arizona-based mattress and bedding retailer with a corporate focus on community giving. For every 10 mattresses the company sells, it donates one bed to a charitable organization.
The Leesa Oasis Chill Hybrid Mattress is one of the brand’s solutions for hot sleepers who prefer a surface that hugs their body closely. This hybrid model comes in Plush and Cushion-Firm, which correspond to medium soft (4) and medium (5) on our 10-point firmness scale. While the mattress lets sleepers sink into the surface, cooling features are engineered to combat heat retention, and a zoned core provides targeted support to promote good posture.
In addition to the Oasis Chill Hybrid, several other models in the Leesa lineup are designed for cooling, including the Studio Chill, the Sapira Chill, and the Deluxe Chill. The company also produces the Leesa Original Mattress, the Original Hybrid, the Sapira Hybrid, the Legend Hybrid, the Studio Mattress, the Plus Hybrid, and several models intended for children.
We’ll break down what makes the Leesa Oasis Chill Hybrid Mattress unique, including its materials and construction, how it performed during our tests, and relevant pricing and policy information.
The Leesa Oasis Chill Hybrid Mattress comes in two firmness levels. While both are best suited to side sleepers, key factors may influence which is ideal for you.
Choose Plush if…
Choose Cushion-Firm if…
You’re a side sleeper who weighs under 130 pounds. The medium soft (4) surface provides exceptional pressure relief and optimal support for most side sleepers in this weight range.
You’re a side sleeper over 130 pounds, a back sleeper under 230 pounds, or a stomach sleeper under 130 pounds. People in these groups still enjoy ample contouring, but the medium (5) surface’s extra support promotes better sleep posture.
Sleeping Style and Body Weight
Leesa Oasis Chill Hybrid Mattress – Plush
Sleeper Type
Under 130 lbs
130-230 lbs
Above 230 lbs
Side Sleepers
Under 130 lbs
10/10
130-230 lbs
7/10
Above 230 lbs
5.5/10
Back Sleepers
Under 130 lbs
7/10
130-230 lbs
5.5/10
Above 230 lbs
4/10
Stomach Sleepers
Under 130 lbs
7/10
130-230 lbs
5.5/10
Above 230 lbs
4/10
Leesa Oasis Chill Hybrid Mattress – Cushion-Firm
Sleeper Type
Under 130 lbs
130-230 lbs
Above 230 lbs
Side Sleepers
Under 130 lbs
8.5/10
130-230 lbs
8.5/10
Above 230 lbs
7/10
Back Sleepers
Under 130 lbs
8.5/10
130-230 lbs
7/10
Above 230 lbs
5.5/10
Stomach Sleepers
Under 130 lbs
7/10
130-230 lbs
5.5/10
Above 230 lbs
5.5/10
Side Sleepers
The Leesa Oasis Chill Hybrid Mattress is best suited to side sleepers. Its three foam comfort layers let a side sleeper’s hips and shoulders sink in deeply, preventing pressure points from forming. Meanwhile, the zoned core adds extra support around the center of the bed to promote good posture.
Thanks to its medium (5) feel, our testers of all weights felt comfortable sleeping on their sides on the Cushion-Firm option. Those over 230 pounds noted that their hips and shoulders could use a bit more support, but they didn’t feel like their spinal alignment was significantly affected. Side sleepers under 130 pounds felt the Plush option’s medium soft feel better relieved pressure buildup. Those between 130 and 230 pounds also enjoyed the Plush option, but testers over 230 pounds sank in too deeply around their hips and shoulders.
Back Sleepers
The Leesa Oasis Chill Hybrid Mattress’ combination of contouring and zoned support is appropriate for some back sleepers. By molding to a back sleeper’s lumbar region, the Oasis Chill Hybrid can ease lower back strain and enhance comfort. The support core’s zoning also reduces hip sagging that could otherwise put pressure on the lower back.
Our testers found the Cushion-Firm to be the better of the two firmness options for back sleeping. Most testers under 230 pounds felt comfortable lying on their back on this firmness level, but those under 130 pounds were more enthusiastic about the surface’s balance of contouring and support.
Stomach Sleepers
Some stomach sleepers under 130 pounds might enjoy the Oasis Chill Hybrid. Its thick comfort system cushions the front of a stomach sleeper’s body. The zoned core also provides enhanced support around a stomach sleeper’s midsection, reducing the risk of back strain.
That said, both of the Oasis Chill Hybrid’s firmness options were too soft for most of our testers. Those under 130 pounds could lie relatively comfortably on their stomach on either model, but they sank in more deeply than ideal. Testers over 130 pounds didn’t get the support they were looking for from either of the Oasis Chill Hybrid’s firmness options, with those over 230 pounds finding the Plush version particularly uncomfortable.
Mattress Performance
In addition to the hands-on feedback from our team, we conduct a number of quantitative tests in our Test Lab. The below ratings are based on the experience of our testers.
Motion Isolation
8/10
Thanks to the Oasis Chill Hybrid’s thicker-than-average comfort system, it absorbs more vibrations than many hybrid models. Each of the three foam layers significantly limits the spread of motion, and vibrations that reach the core also don’t transfer much because the coils are pocketed and move independently of one another.
In our evaluations, team members could barely feel when their testing partner changed positions on the other side of the bed. Sleepers who are sensitive to their partners’ movements may find the Oasis Chill Hybrid a great solution.
Pressure Relief
6/10
Like many hybrid models with generous comfort systems, the Oasis Chill Hybrid provides significant pressure relief. Its three foam layers cushion the surface and mold to a sleeper’s body to redistribute their weight. This combination creates a plush feel while preventing pressure buildup around key areas like the hips and shoulders.
Temperature Control
7/10
As its name suggests, the Oasis Chill Hybrid is billed as a cooling mattress, and our temperature readings showed that the surface stays cooler than many models with close-conforming comfort systems.
This may be due in part to its cooling technology. The cover uses a blend of polyester, polyethylene, and rayon engineered for cooling. Additionally, the first layer of foam in the comfort system contains gel infusions designed for temperature regulation.
The second and third layers are memory foam. This viscoelastic material is sometimes prone to overheating because of its tendency to absorb warmth and hug the body closely. The Oasis Chill Hybrid incorporates a copper infusion in the second layer that’s intended to counteract this effect by dispersing heat so it doesn’t build up around the sleeper’s body. Airflow through the coil core further cools the mattress.
Edge Support
8/10
Plush: 5.5 / 10
Cushion-Firm: 7 / 10
Due to the Leesa Oasis Chill Hybrid Mattress’ thick comfort system, our testing team noted mild to moderate compression along the mattress perimeter before reaching the reinforced edges of the coil support core.
Many hybrids have sturdier edges than the Oasis Chill Hybrid, but we’d expect similar results from other models with a medium soft (4) or medium (5) feel and ample layers of foam.
The Cushion-Firm option’s medium feel contributed to a slightly more supportive perimeter. Most team members were comfortable sitting or lying along the edges, though those over 230 pounds felt much more secure in the center of the bed.
The Plush version’s medium soft feel limited the space our testers were comfortable using. The edge instability made them feel like they could slip off if they got too close to the perimeter.
Ease of Movement
6.5/10
Plush: 5.5 / 10
Cushion-Firm: 7 / 10
The Leesa Oasis Chill Hybrid Mattress is slightly more challenging to move on than the average hybrid model we’ve tested. Hybrid mattresses are often quite responsive due to their bouncy coil cores. But because of this model’s thick foam comfort system, our testing team barely detected the bounce of the coils.
Due to the plusher feel, testers also sank relatively deeply into the foam layers, impeding their movement. This was more pronounced on the Plush option than the Cushion-Firm. Additionally, the memory foam retained body impressions for a moment when testers moved, making position changes more difficult.
Off-Gassing
The Oasis Chill Hybrid Mattress contains synthetic foam and ships compressed, so it emits some off-gassing odors. Off-gassing is a result of a mattress trapping volatile organic compounds (VOCs) from the foam during manufacturing and releasing them when the mattress is unpacked.
If you’re sensitive to smells, let your mattress air out in a well-ventilated room for a few days. Our testing team reported that most detectable odors dissipated within 48 hours.
Leesa uses foams certified by CertiPUR-US, which means the material meets third-party standards for low indoor VOC emissions.
The Leesa Oasis Chill Hybrid Mattress is a 13.5-inch-thick hybrid model that comes in two firmness options. The Plush version equates to a medium soft (4) on our 10-point firmness scale, while the Cushion-Firm has a medium (5) feel.
A 1.75-inch layer of polyfoam serves as the first comfort layer. It’s quilted into the cover and is infused with gel intended to disperse heat. Next, a 1.5-inch layer of memory foam provides deeper cradling, and a copper infusion is included to further dissipate body warmth. The final layer of the comfort system uses 1.5 inches of more adaptive memory foam designed to enhance the bed’s responsiveness.
The mattress’ support core contains 8 inches of individually pocketed coils arranged in firmness zones to provide extra support in the center of the bed and along its edges. A final 0.75-inch layer of high-density polyfoam supports the coils, giving them an even surface to compress against.
A fabric cover containing a blend of polyester, polyethylene, and rayon wraps around the mattress. This material is designed for surface-level cooling.
The Leesa Oasis Chill Hybrid Mattress’ price tag falls comfortably in the average range for a hybrid model. We consider it to be a good value since it uses components common in higher-end models, such as a generous comfort system, features designed for cooling, and a zoned core. This model is available in each of the six standard mattress sizes.
The Leesa Oasis Chill Hybrid is sold through the Leesa website and ships within the United States. Select Leesa products are also available through West Elm and Pottery Barn, though different policies may apply.
Shipping
Leesa provides free shipping to all 50 U.S. states via FedEx.
The Leesa Oasis Chill Hybrid Mattress is shrink-wrapped, rolled, and boxed for shipping. While expansion takes about an hour after unboxing, it may take a few days for the mattress to reach its intended firmness.
Additional Services
White Glove delivery is available for a fee. With this service, a team will bring in your new mattress, set it up, and remove the packaging materials. The company also offers mattress removal services for an additional fee on top of the in-home delivery charge.
Sleep Trial
The Leesa Oasis Chill Hybrid Mattress comes with a 100-night sleep trial. After trying the mattress for at least 30 nights, customers become eligible to return the mattress for the remainder of the trial window. Leesa will arrange mattress pickup and issue a full refund of the purchase price. A $100 return fee applies for customers in Alaska and Hawaii.
This sleep trial policy applies to the first mattress purchased per household and does not cover damaged mattresses.
Warranty
A 10-year limited warranty protects the Leesa Oasis Chill Hybrid Mattress. Leesa will repair or replace defective mattresses covered under the warranty. Qualifying defects include visible indentations over 1 inch deep and craftsmanship flaws in the memory foam and the cover’s seams or zipper. The mattress owner is responsible for any associated transportation costs.
Still have questions?
Our product experts have extensive experience testing just about every sleep product on the market. Send an email to [email protected] or call us at (877) 672-8966 with your questions and we’ll help you find exactly what you’re looking for.
