If you’re researching the Leesa and Amerisleep mattresses, then I’ll bet that you’re shopping for an all-foam bed-in-a-box mattress. Trying to sort out which is the right bed for you? You’ve come to the right place.
In this comparison, we’ll take a focused look at the key differences between these two mattress models. Although they seem similar at first glance, they’re actually quite different mattresses.
An Overview
Customer Rating
MA Score
Summary
Firmness
Type
Trial Period
Warranty
Customer Rating
MA Score
9.1/10
Summary
Foam blend mattress that's ideal for the average sleeper
Firmness
Medium-firm: 6/10
Type
Foam combo
Trial Period
100 days
Warranty
10-year limited warranty
Customer Rating
MA Score
8.4/10
Summary
Memory foam mattress with cooling technology (part of Amerisleep's Soft Collection)
Firmness
Medium: 6/10
Type
Memory foam
Trial Period
100 days
Warranty
20-year limited warranty
Leesa
Amerisleep AS3
Customer Rating
MA Score
9.1/10
8.4/10
Summary
Foam blend mattress that's ideal for the average sleeper
Memory foam mattress with cooling technology (part of Amerisleep's Soft Collection)
Firmness
Medium-firm: 6/10
Medium: 6/10
Type
Foam combo
Memory foam
Trial Period
100 days
100 days
Warranty
10-year limited warranty
20-year limited warranty
Key Similarities
- Both of these beds have a medium to medium-firm feel, which is also known as the universal firmness option because so many people love it. This firmness level cushions all sleeping positions and relieves back pain for most body types.
- The Leesa and AS3 are both all-foam mattresses with a few simple—but effective—layers of foam.
- Each of these beds did notably well on our motion transfer test, which is typical of foam mattresses. They effectively isolate motion on one side of the bed from the other.
Key Differences
- The Leesa and AS3 mattresses deploy different cooling technologies. Leesa’s comfort layer is remarkably breathable, allowing for lots of airflow. The AS3 mattress features open cell memory foam that enables body heat to escape from the foam.
- Amerisleep’s 20-year warranty is twice as long as Leesa’s 10-year warranty.
- The Leesa’s foam layers do a better job of quickly responding to tossing and turning than those of the AS3. On the flip side, the AS3 was easier to set up than the Leesa.
- Amerisleep’s AS3 has a luxury mattress price range. It runs $350-$500 more expensive than the Leesa.
Leesa Mattress Review Highlights
- High-Rated: The Leesa is quite possibly the highest rated sleep product on Mattress Advisor. In every category, it scored 8.5/10 or higher.
- LSA200 Foam Technology: This proprietary foam is responsive and pressure relieving, making it a good choice for combo sleepers and side sleepers.
- Durable: Memory foam mattresses can form body impressions over years of use, but the Leesa resembled a new mattress after tests simulating a whole decade of normal wear.
- Spinal Alignment: This is one of Leesa’s highest scoring categories. When you sleep on this bed, your back and neck will stay nice and straight all night long.
- Social Impact: If giving back to the community is a priority to you, then you’ll be pleased to learn that Leesa donates one mattress to a child in need for every 10 they sell, amounting to over 37,000 donated mattresses!
- Are you more into innerspring beds? Leesa offers two hybrid models, the Leesa Hybrid and the Leesa Legend.
Amerisleep Mattress Review Highlights
- Eco-Friendly: The AS3 is constructed with Bio-Pur memory foam. This proprietary foam is made with plant-based oils, so you’ll notice little to no off-gassing during your first few nights with the mattress.
- Breathability: Bio-Pur memory foam has a highly breathable open cell structure that allows heat to move away from your body and out of the mattress.
- HIVE Technology: The second foam layer, also called the Affinity Transition Layer, features ergonomic support for pressure points. With less stress on your shoulders and hips, it feels like you are floating on a cloud.
- 20-Year Warranty: Amerisleep’s mattresses are protected by a warranty that lasts 2 full decades. You can request a replacement mattress if you notice sagging or other manufacturing defects on your AS3 mattress.
- Motion Transfer: The AS3’s score for motion transfer means couples, parents, and pet owners need not worry about disruptions when joined by a midnight visitor.
- For more firmness options, check out one of the 4 other Amerisleep models: AS1, AS2, AS4, and AS5.
Leesa and Amerisleep Sizes
Curious how the sizes for these mattresses compare? Check out the chart below.
| Leesa | Amerisleep | |
| Thickness | 10” | 12” |
| Twin | 39” x 75” | 38” x 74” |
| Twin XL | 39” x 80” | 38” x 80” |
| Full | 53” x 75” | 54” x 75” |
| Queen | 60” x 80” | 60” x 80” |
| King | 76” x 80” | 76” x 80” |
| California King | 72” x 84” | 72” x 84” |
Learn more about mattress sizes.
Compare Prices
Take a look at the prices for the mattress sizes offered by Leesa and Amerisleep.
| Leesa | Amerisleep | |
| Twin | $799 | $1,149 |
| Twin XL | $849 | $1,199 |
| Full | $999 | $1,349 |
| Queen | $1,099 | $1,499 |
| King | $1,299 | $1,899 |
| California King | $1,299 | $1,899 |
Compare Layers and Feel
Next, we’ll look inside the Leesa and AS3 mattresses to get a better idea of what’s behind their special features.
Inside the Leesa Mattress
- Mattress Cover: The entire Leesa mattress is wrapped in a twill fabric cover made from a proprietary mix of fibers. It’s soft, seamless, and adorned with Leesa’s signature four-stripe design.
- Comfort Layer: The Leesa’s top layer is 2” of breathable, responsive foam. This foam provides instant pressure relief and enhances motion isolation.
- Memory Foam Layer: This foam layer does a great job of contouring around your pressure points. It has a traditional memory foam feel.
- Support Foam: Leesa’s base layer is 6” of durable high-density foam. This layer prevents you from sinking too far into the mattress.
Inside the Amerisleep Mattress
- Celliant Cover: Amerisleep’s signature mattress cover features Celliant material that turns your body heat into cooling, calming infrared energy.
- Comfort Layer: Made from breathable Bio-Pur foam, the AS3’s comfort layer cradles your body without being suffocating. The open cell structure keeps your body heat moving away from the mattress surface.
- Transition Foam: Also called the Affinity Layer, this piece of memory foam includes the HIVE technology that targets your different spinal regions with precise support.
- Support Layer: Anchoring the AS3 is Bio-Core Foam, a thick polyurethane base that keeps the whole mattress strong and durable.
Compare Our Scores
We tested both of these mattresses in our lab using our 14-point assessment. Get a more nuanced sense of where these two mattresses shine by comparing their Mattress Advisor assessment scores below.
| Leesa | Amerisleep | |
| Shipping | 10 | 8 |
| Trial Period | 9 | 9 |
| Return Policy | 10 | 10 |
| Warranty | 9 | 10 |
| Set-Up Test | 8.5 | 9.5 |
| Motion Transfer Test | 9 | 8.75 |
| Edge Support Test | 8.5 | 8 |
| Pressure Relief Test | 8.5 | 7.75 |
| Spinal Alignment Test | 9 | 8.25 |
| Responsiveness Test | 9.5 | 7 |
| Cooling Evaluation | 8.5 | 8 |
| Durability Evaluation | 9 | 8.5 |
| Customer Service Score | 9 | 9 |
| Social Impact Score | 10 | 4 |
| TOTAL SCORE | 9.1/10 | 8.4/10 |
At this point, you probably have an idea of which mattress is better for you. We’d like to help that reasoning along by highlighting these mattresses’ performances on pressure relief, spinal alignment, and responsiveness.
Pressure Relief and Alignment
The Leesa scored 0.75 points better than the AS3 for pressure relief. It does a slightly better job of lifting stress off of your pressure points, making it the better option for side sleepers. The Leesa also outperformed the AS3 by 0.75 points for spinal alignment. This is an important factor for all sleeping positions, but particularly stomach sleepers.
Responsiveness
Combo sleepers should pay attention to the scores for responsiveness, which measure how well a mattress responds to your changes in position. Again, the Leesa scored higher, this time by 1.5 points.
We’d like to point out that neither of these mattresses scored poorly in any of these areas, so you’re set for success with both beds.
Motion Transfer
Your particular sleep environment plays a role in which mattress will feel the most comfortable. Couples often look for a mattress that will reduce disruptions from their sleeping partners. Both the Leesa and AS3 scored high on motion isolation, so both are good picks.
Cooling
Additionally, hot sleepers or those in warm climates look for mattresses that sleep cool. While the Leesa marginally outperformed the AS3 in this category, both mattresses feature effective cooling technologies.
TLDR: Which Is the Best Mattress?
While we love both of these all-foam mattresses, the Leesa outperformed the Amerisleep AS3 in all but two categories. Not only is it one of Mattress Advisor’s highest rated mattresses, it’s also more affordable than the AS3. AS3 is the bed for you if you’re looking for the long-term insurance the 20-year warranty can provide.
More Leesa and Amerisleep Comparisons
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