Best for
- Side sleepers who want more pressure relief than AS2.
- Back sleepers who like a medium memory-foam feel.
- Couples who need very low motion transfer.
- Shoppers who want the broadest sleeper fit in Amerisleep's foam lineup.
Review
Amerisleep AS3 Mattress Review
Overall rating
8.6
Deal TruthChecked Jul 20, 2026
High price based on tracked history
Three all-foam Queen checks show that the price changed in July. The latest all-foam price is the current benchmark; AS3 Hybrid pricing is a separate configuration and is not comparable here.
Good deal at or below
≤$1,149
Typical sale
$1,149-$1,199
High price at or above
≥$1,199
Mattress typeAll-foam memory foam
FirmnessMedium
Best forSide sleepers who want more pressure relief than AS2.
See if this mattress fits you
Choose traits
Select what sounds like you
Pick one or more traits above and we will show the strengths and watch-outs that matter for this mattress.
What supports this
Watch-outs
Bottom line
Quick verdict
Skip if
- You are a stomach sleeper who needs firm hip lift.
- You sit on the edge often or need edge support for mobility.
- You want a springy or latex-like mattress.
- You are comparing AS3 foam and AS3 Hybrid and have not decided which build you want.
Bottom line
Choose the AS3 if you want a medium foam mattress for side or back sleeping and need excellent control of partner movement. Skip it if you need firm stomach-sleeper lift, a stable sitting edge, or the bounce of a hybrid or latex mattress.
Performance
How it actually performs
What this score means
What supports this
Watch-outs
How we reached it
- Testing showed excellent pressure relief.
- The 3-inch Bio-Pur comfort layer gives more plushness than the AS2.
- The HIVE transition layer adds targeted cushioning under pressure points.
- Some owners still report firmness mismatch.
- Stomach sleepers may need the firmer AS2 or a hybrid.
Pressure-relief testing landed at the top of the range. The 2.12–2.20-inch measured sinkage and 6-inch comfort system fit a medium foam surface that gives shoulders and hips more room than AS2, while owner fit reports keep the pressure-relief guidance focused on side and back sleepers.
- The HIVE layer adds zoning under the comfort foam.
- Medium feel works for many combination sleepers.
- The support core is substantial for an all-foam mattress.
- Stomach sleepers over 130 lb should compare firmer choices.
- Heavier sleepers may prefer AS3 Hybrid or a firmer coil hybrid.
The AS3 has moderate 2.12–2.20-inch sinkage, a 12-inch profile, zoned transition foam, and quick enough recovery for many side and back sleepers. The medium feel and low 6.58–6.84-inch bounce are the reasons stomach sleepers and heavier bodies should compare firmer builds.
- Testing showed extremely low motion transfer.
- All-foam construction absorbs smaller movements.
- Low bounce helps keep motion from traveling across the surface.
- Low motion comes with lower bounce.
Motion-transfer testing was exceptional, with peak-to-peak acceleration of 2.07–2.15 m/s². The all-foam build and low 6.58–6.84-inch bounce help quiet partner movement, though that same muted feel is less responsive for sleepers who want spring.
Instrumented motion test
≈2% reading variation
Movement reaching the other side
A fixed 12 lb load creates the impact while an accelerometer records the movement that crosses the mattress.
Lower transferHigher transfer
- The Refresh cover is designed for cooler surface feel.
- Open-cell Bio-Pur foam supports airflow better than dense traditional foam.
- Testing supports strong cooling for foam.
- Close foam contour can still hold more heat than coils or latex.
Cooling testing was strong for foam. The Refresh cover, open-cell Bio-Pur foam, moderate sinkage, and 12-inch all-foam build support a cooler-than-traditional-memory-foam feel, but close contour can still run warmer than coils or latex.
- Testing showed excellent lying-edge support.
- Testing showed 5.39–5.61 inches of sitting-edge compression.
- There is no reinforced coil perimeter.
- Couples using every inch of a queen should compare hybrids.
Edge testing was split: lying near the perimeter rated Excellent, but sitting compression measured 5.39–5.61 inches. That makes the AS3 more workable for sleeping near the side than for sitting on the edge to dress or get in and out of bed.
Instrumented + practical edge test
40% seated · 60% lying
Support at the mattress perimeter
We measure seated compression, then check how secure the surface remains while lying directly along the edge.
- Full recovery was quick in testing.
- Medium firmness avoids the deepest sink of plush foam.
- Bounce is low.
- Deeper contour can make position changes feel slower.
Response testing was quick for memory foam: mostly recovered in 0.49–0.51 sec and fully recovered in 0.78–0.82 sec. Bounce measured a low 6.58–6.84 inches, so the AS3 will not feel dead, but position changes are slower than on latex or coils.
- The comfort and support layers are thicker than many budget foam mattresses.
- The 12-inch profile includes a 6-inch comfort system.
- Normal foam softening can still change the feel over time.
- Long-term AS3-specific owner evidence remains limited.
The 12-inch all-foam build has a 6-inch comfort system and a substantial support core. Those dimensions support a good durability outlook, while the limited AS3-specific multi-year record prevents a stronger conclusion.
- Trial: 100 nights
- Eligible return cost: $0 for eligible mattress returns after the 30-night minimum
- Warranty: 20 years, limited; first 10 years full, second 10 years prorated
- Minimum trial period: 30 nights after delivery
- Free lower-48 mattress shipping and eligible returns; non-lower-48 buyers may need a freight forwarder and are responsible after freight-forwarder receipt
- Free or discounted gifts may need to be returned or their retail value can be deducted; accessories and bases have narrower or final-sale terms.
The score uses the policy terms shown in the Fine Print Check below. Models governed by the same terms use the same policy inputs.
Marketing vs. reality
What the claims mean in practice
ClaimBrand saysReality checkBuyer impact
Most versatile feel
MixedAmerisleep describes the AS3 as its most versatile mattress for all sleep styles.
Mostly supported. The medium feel is the best broad-fit Amerisleep foam option, but stomach sleepers and heavier bodies may need more support.
Choose it as the default Amerisleep foam option, not as a guarantee for every body type and position.
Pressure relief
SupportedAmerisleep says Bio-Pur and HIVE technology contour to the body and relieve pressure points.
Supported. Testing and construction make pressure relief the AS3's strongest score.
This is the best reason to choose AS3 over AS2 if you sleep on your side or want a plusher foam surface.
Cooling memory foam
MixedAmerisleep highlights the Refresh cover and open-cell Bio-Pur foam as cooling features.
Mostly supported for memory foam. Testing supports strong cooling, but all-foam contour is still warmer than a breathable hybrid for many hot sleepers.
Good for foam shoppers who sleep warm; compare hybrids if cooling is the top priority.
Free returns
MixedAmerisleep promotes free eligible mattress returns during the 100-night trial.
Supported with fine print. The return policy includes a 30-night minimum and cart items outside the mattress may follow different rules.
The policy is useful, but do not treat accessories or gifts as covered the same way as the mattress.
Fit by sleeper type
Will it work for your body and position?
SleeperUnder 130 lb130-230 lbOver 230 lb
Side
Under 130 lb
130-230 lb
Over 230 lb
Back
Under 130 lb
130-230 lb
Over 230 lb
Stomach
Under 130 lb
130-230 lb
Over 230 lb
Combination
Under 130 lb
130-230 lb
Over 230 lb
Owner feedback
What buyers report after living with it
Common praise
Praise centers on the AS3's medium feel, side/back pressure relief, low motion transfer, and fiberglass-free construction. Positive owners often frame it as a comfortable middle choice in the Amerisleep lineup.
Common concerns
Complaints focus on firmness mismatch in both directions, off-gassing for some buyers, weak sitting-edge support, low bounce, and return or refund friction. Hybrid and all-foam reports must be kept separate.
Sources reviewed
Reddit owner discussionsPositive owners describe a comfortable medium feel, good pressure relief, and little partner disturbance. Complaints focus on firmness mismatch, off-gassing, low bounce, return or refund delays, and occasional confusion between the AS3 foam and AS3 Hybrid.
Amerisleep customer reviews
PositiveCustomer reviews displayed by Amerisleep are broadly positive about the AS3's versatile medium feel. Independent owner reports add important cautions about fit mismatch, off-gassing, and return or service friction.
Amazon listingThe Amazon listing confirms marketplace availability but does not establish comfort, durability, service, or owner satisfaction. Its prices, policies, and versions may differ from Amerisleep's website.
YouTube review coverageVideo coverage provides lineup context for the AS3 as Amerisleep's medium option between the firmer AS2 and softer AS5.
Sources reviewed
Reddit owner discussions
Positive owners describe a comfortable medium feel, good pressure relief, and little partner disturbance. Complaints focus on firmness mismatch, off-gassing, low bounce, return or refund delays, and occasional confusion between the AS3 foam and AS3 Hybrid.
- Amerisleep AS3 and customer service review
AS3 all-foam owner report covering comfort, off-gassing, topper offer, return, and refund timing.
- Amerisleep AS3 return issue
AS3 California King return complaint covering off-gassing and refund-friction context.
- Amerisleep Exchange Question
AS3-to-AS2 exchange thread that helps explain when AS3 feels too soft.
- Amerisleep deceptive practices
Older AS3 foam/hybrid confusion report serves as model-variant history, not current product fact.
- AS3 owner comment in mattress-search thread
Recent owner comment with AS3 fit praise and softness mismatch across partners.
Amerisleep customer reviews
Customer reviews displayed by Amerisleep are broadly positive about the AS3's versatile medium feel. Independent owner reports add important cautions about fit mismatch, off-gassing, and return or service friction.
- Amerisleep AS3 product page
Lists the current all-foam construction, price, benefits, and displayed customer-review themes.
- Amerisleep mattress reviews
Displays customer praise themes used as brand-hosted context rather than independent performance evidence.
Amazon listing
The Amazon listing confirms marketplace availability but does not establish comfort, durability, service, or owner satisfaction. Its prices, policies, and versions may differ from Amerisleep's website.
- Amazon Amerisleep AS3 listing
Product-specific marketplace listing adds secondary retail context.
YouTube review coverage
Video coverage provides lineup context for the AS3 as Amerisleep's medium option between the firmer AS2 and softer AS5.
- Amerisleep AS1-AS5 comparison
Video comparison of Amerisleep foam models and their relative firmness/fit roles.
What to know before buying
Fine Print Check
Fine print
Policy source
Policy details that can change the decision
AreaWhat Amerisleep saysWhy it matters
Trial and returns
Amerisleep advertises a 100-night mattress trial and says customers should sleep on the mattress for at least 30 nights before initiating a return.
You get a real home trial, but it is not a day-one return window.
Model variant
The current AS3 product page sells foam and hybrid material variants.
The tested configuration is the all-foam AS3. The AS3 Hybrid has a different construction, feel, and price.
Warranty proof
The mattress warranty covers structural defects and center-surface impressions greater than 1.5 inches, with exclusions for normal softening, corners, edges, stains, misuse, and improper support.
Comfort changes that do not meet the visible-impression threshold may not qualify for warranty relief.
Model checked
Reviewed model details
Model checkedJul 20, 2026Current model
Configuration testedMedium 5/10 · 12-inch all-foam
Price checkedJul 20, 2026
Inside the mattress
Construction & materials
Refresh coverCooling fabric cover · Top
Amerisleep positions the cover as a cooling surface designed to draw heat away from the body. As the surface textile, it chiefly affects the initial hand feel, moisture movement, and how readily heat leaves the sleeper; it supplies little of the mattress's deep support.
Why it matters: Across the Amerisleep AS3 Mattress, testing supports strong cooling for foam. Treat the cover as one part of thermal comfort rather than proof that the mattress will stay cool for every sleeper.
Bio-Pur comfort foamOpen-cell memory foam · Top
3"
The AS3 has more memory foam than the AS2, which is why it feels more pressure-relieving and better suited to side sleepers. Memory foam conforms under sustained load, spreading pressure over a larger contact area. Its thickness and position influence contour depth and how quickly the sleeper reaches firmer layers below.
Why it matters: For the Amerisleep AS3 Mattress as a whole, testing showed excellent pressure relief. This is one of the layers most responsible for shoulder and hip cushioning; sleepers who dislike a close contour should compare it with the mattress’s recorded sinkage and recovery.
HIVE transition foamZoned polyfoam · Middle
3"
This layer adds targeted support below the memory foam and helps the mattress feel less like a simple slab of foam. This layer buffers the sleeper from the firmer support core and controls how gradually resistance increases as the body sinks deeper.
Why it matters: In the finished Amerisleep AS3 Mattress, the support core is substantial for an all-foam mattress. It becomes especially important for higher-weight sleepers and back or stomach sleepers, who engage more of the mattress depth than lighter sleepers.
Bio-Core support foamHigh-density support foam · Base
6"
The support core gives the AS3 structure while preserving its medium all-foam feel. This foundation resists deep compression and keeps the comfort layers working on a stable plane; it is not intended to provide the mattress’s initial plushness.
Why it matters: Across the Amerisleep AS3 Mattress, the comfort and support layers are thicker than many budget foam mattresses. Its thickness and material quality are more relevant to long-term shape retention and bottoming-out resistance than to surface softness.
Height12"
Firmness optionsMedium
Available sizesTwin, Twin XL, Full, Queen, King, California King, Split King
CertificationsCertiPUR-US, Fiberglass-free
Compare before buying
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