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Pick one or more traits above and we will show the strengths and watch-outs that matter for this mattress.
Choose the AS2 if you sleep on your back or stomach and want a medium-firm foam mattress that absorbs partner movement extremely well. Skip it if you need plush side-sleeper cushioning, substantial bounce, or a reinforced sitting edge.
Pressure maps showed side-sleeper average/max pressure of 0.186–0.194/1.14–1.18 PSI, back at 0.098–0.102/0.87–0.91 PSI, and stomach at 0.108–0.112/1.22–1.26 PSI. Sinkage measured 1.96–2.04 inches, with a 5.0-inch comfort layer on a 12-inch profile, so the AS2 has real cushioning but still feels firmer than AS3 or AS5.
Repeated readings can vary by about 2%, so we report the full measured range instead of a single value.
| Position | Sustained pressure after the tester settles. The range shows the small variation across repeated readings. | The brief highest pressure at first contact. The range shows the small variation across repeated readings. |
|---|---|---|
| Side | 0.186–0.194 PSI | 1.14–1.18 PSI |
| Back | 0.098–0.102 PSI | 0.87–0.91 PSI |
| Stomach | 0.108–0.112 PSI | 1.22–1.26 PSI |
These PSI ranges are measured values. Map colors show where pressure collected, not the PSI of each square.
Sinkage measured 1.96–2.04 inches on a 12-inch profile, response mostly recovered in 0.29–0.31 seconds, and bounce stayed low at 6.81–7.09 inches. The medium-firm feel, zoned transition layer, and 7-inch base foam make the AS2 more dependable for back and stomach support than for plush side-sleeper contouring.
Motion-transfer testing scored 9.7/10, with peak-to-peak acceleration of 5.63–5.87 m/s². The all-foam construction and low 6.81–7.09-inch bounce help keep partner movement quiet, though the same low bounce makes the mattress less springy.
A fixed 12 lb load creates the impact while an accelerometer records the movement that crosses the mattress.
Cooling testing scored 9.0/10, while sinkage measured 1.96–2.04 inches. The Refresh cover and open-cell Bio-Pur foam support better heat control than dense traditional memory foam, but the all-foam build still has less airflow than a coil hybrid. The final 8.8 rating reflects that construction limit.
Edge-support testing scored 8.7/10. Sitting compression measured 4.17–4.33 inches, while lying edge support was rated excellent. That makes the AS2 more convincing for sleeping near the side than for frequent sitting or mobility support.
We measure seated compression, then check how secure the surface remains while lying directly along the edge.
Response timing showed most recovery in 0.29–0.31 seconds and full recovery in 1.08–1.12 seconds. Bounce measured a low 6.81–7.09 inches, so the AS2 changes shape quickly for foam but does not give the assisted movement of latex or coils.
The 12-inch all-foam build includes a 5.0-inch comfort system and 7-inch support core. Some owners report sagging, softening, impressions, or loss of support, making the comfort system the principal long-term wear concern despite the substantial base.
The score uses the policy terms shown in the Fine Print Check below. Models governed by the same terms use the same policy inputs.
Amerisleep positions the AS2 as its medium-firm mattress for healthy spinal alignment, especially for back and stomach sleepers.
Supported. The medium-firm feel, zoned transition foam, and testing all support this as the main reason to choose AS2.
Choose it if you want firmer foam support. Side sleepers looking for deep plushness should compare AS3 or AS5.
Amerisleep highlights Refresh Cooling Technology and open-cell Bio-Pur foam as cooling upgrades over traditional memory foam.
Mostly supported. Testing and owner reports support strong cooling for foam, but it is still an all-foam mattress.
Good if you want memory foam without the warmest feel. Very hot sleepers should still compare hybrids.
Amerisleep describes the AS2 as fiberglass-free, eco-friendly, and non-toxic.
Supported by current official product language and the testing design table.
This is a useful safety and maintenance point, especially for shoppers avoiding fiberglass concerns.
Amerisleep promotes easy, free mattress returns during the 100-night trial.
Supported with fine print. Current policy says eligible mattress returns are free, but the mattress must be tried for 30 nights and cart gifts or non-mattress items can change the refund picture.
The policy is strong, but confirm every item in the cart and keep the 30-night minimum in mind.
Reddit owner discussionsAvailable AS2 owner discussions include positive reports that describe firm back and stomach support, while complaints focus on excessive firmness for side sleeping, sagging, and declining support.
Reviews displayed by Amerisleep commonly praise the AS2's support and cooling. Independent owner reports provide a counterweight because brand-hosted feedback may not represent the full range of experiences.
Amazon listingThe Amazon listing confirms marketplace availability but does not provide the evidence used for comfort, durability, service, or owner-satisfaction findings.
YouTube review coverageVideo coverage provides additional context for the AS2's feel, construction, and fit relative to softer Amerisleep models.
Available AS2 owner discussions include positive reports that describe firm back and stomach support, while complaints focus on excessive firmness for side sleeping, sagging, and declining support.
AS2 owner report covering firm feel and stomach/side couple fit.
AS2 follow-up describing firm support, back-pain improvement, and no visible sagging at that point.
AS2 longer-term update raising sagging, back pain, and support concerns.
AS3 owner found it too soft and was offered an AS2 exchange, which clarifies the medium versus medium-firm fit difference.
Reviews displayed by Amerisleep commonly praise the AS2's support and cooling. Independent owner reports provide a counterweight because brand-hosted feedback may not represent the full range of experiences.
Lists the current construction, benefits, price, and displayed customer-review themes.
Displays customer praise themes used as brand-hosted context rather than independent performance evidence.
The Amazon listing confirms marketplace availability but does not provide the evidence used for comfort, durability, service, or owner-satisfaction findings.
Product-specific listing included only for retail availability context.
Video coverage provides additional context for the AS2's feel, construction, and fit relative to softer Amerisleep models.
Video review themes focused on AS2 feel, construction, and buyer fit.
Amerisleep advertises a 100-night mattress trial and says customers should sleep on the mattress for at least 30 nights before initiating a return.
This is a meaningful trial, but not a day-one return window.
Current FAQ language frames eligible mattress returns as free after the required sleep period.
The current policy is buyer-friendly, but older owner reports about return friction still matter as service context.
Free or discounted gifts may need to be returned or deducted, and many non-mattress products have narrower return terms.
Do not assume every item in the cart follows the mattress return policy.
The warranty covers defects and visible center-surface indentations greater than 1.5 inches, with exclusions for corners, edges, normal softening, stains, misuse, and improper support.
Warranty coverage is not the same as comfort protection or a guarantee against gradual softening.
Model checkedJun 19, 2026Current model
Configuration testedMedium-Firm 6/10 · 12-inch all-foam
Price checkedJul 21, 2026
Refresh coverCooling fabric cover · Top
Amerisleep says the Refresh cover is designed to draw heat away from the body and feel cooler than a traditional polyester cover. 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 AS2 Mattress, testing supports a strong cooling score 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
2"This is the AS2's main comfort layer. It gives the mattress pressure relief while keeping the overall feel medium firm rather than plush. 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 AS2 Mattress as a whole, testing showed strong pressure relief from the 5-inch comfort system. 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"The transition layer adds targeted support and cushioning between the softer memory foam and the dense base 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 AS2 Mattress, its medium-firm feel and measured performance suit back and stomach sleeping. 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
7"The support core gives the AS2 its flatter, more supportive feel for back and stomach sleepers. 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 AS2 Mattress, the support core is 7 inches thick. Its thickness and material quality are more relevant to long-term shape retention and bottoming-out resistance than to surface softness.
Medium-firm all-foam support: You want Amerisleep's firmer foam choice for back or stomach sleeping.
Choose if: You like Amerisleep but want a more balanced medium feel for side/back sleeping.
Watch out: It has weaker sitting-edge support and less firm stomach-sleeper lift.
Read reviewChoose if: You want deeper shoulder and hip pressure relief.
Watch out: It costs more and is riskier for back or stomach support.
Read reviewChoose if: You want firmer support with more coil bounce and airflow.
Watch out: It will not isolate motion as quietly as the AS2.
Read review