Quick verdict
Watch our original Amerisleep AS3 mattress review
Our 2019 video shows an earlier all-foam AS3; current models and test results may differ.
Yawnder Reviews · Updated September 2026
Medium plant-based foam, re-tested
The Amerisleep AS3 is a 12-inch all-foam mattress aimed at sleepers who want a medium feel with responsive contouring. We tested the AS3 with Yawnder's standardized protocol on August 27, 2026.
Yawnder test results
| Overall score | 8.4 / 10 |
|---|---|
| Firmness | 6 / 10 |
| Spine alignment | 8.4 |
| Pressure relief | 8.8 |
| Cooling | 8.2 |
| Motion transfer | 8.8 |
| Edge support | 7.2 |
| Responsiveness | 8 historically reported; current test panel lists ease of movement as not measured |
| Expected durability | 8.4 |
| Off-gassing | 8.6 |
Standardized Yawnder test completed August 2026. See how we test and score.
Where it stands out
- Pressure relief 8.8/10, Motion transfer 8.8/10, Off-gassing 8.6/10
- Side and combination sleepers who want foam contouring with strong pressure relief.
- The current standardized panel identifies this as a partial record; manufacturer specifications are separate.
Where it is limited
- Edge support is 7.2/10 in the current panel; ease of movement is marked not measured there
- Feel and score profile apply to the tested configuration; other firmness choices can feel materially different.
Current specs and terms
| Type | Foam |
|---|---|
| Height / profile | 12 inches |
| Price reference | $1,549 Yawnder reference price |
| Trial | 100 nights |
| Warranty | 20-year limited |
Who should buy it
Side and combination sleepers who want foam contouring with strong pressure relief.
AS3 construction: all-foam versus hybrid
The mattress tested in this review is the all-foam AS3. Amerisleep also sells an AS3 Hybrid with coils, and the foam mattress's Yawnder scores should not be transferred to that version. Both are listed with a medium feel, but their support cores and individual feel differ. Check the material selection, size and full product name before comparing prices.
Inside our original Amerisleep AS3 sample
This 2019 clip shows the layers in the older all-foam AS3 reviewed by Yawnder; current construction may differ.
Amerisleep describes the foam model's Bio-Pur comfort foam as plant-based and its HIVE design as a zoned support system. These are the manufacturer's construction descriptions. Plant-based foam is still foam; it does not establish that the mattress is entirely plant-derived or that it will sleep at a particular temperature. A zoned layer is intended to vary support across areas of the body, but how it feels depends on the sleeper and the entire mattress.
Feel, fit and the test results
Yawnder's existing AS3 record reports a 6/10 firmness, 8.8/10 for pressure relief and 8.8/10 for motion transfer, with 7.2/10 for edge support. Those results provide a useful starting point for comparing the tested foam model, not a guarantee that every sleeper will experience the same comfort. The current standardized panel marks ease of movement as not measured; an older body table reported an 8 for responsiveness, so we have identified that difference rather than presenting the two fields as the same verified result.
Side sleepers: Check shoulder and hip cushioning with a pillow that keeps your head comfortable. Back sleepers: Notice whether the hips feel supported without a hard spot at the lower back. Stomach sleepers: Compare a firmer option if the midsection sinks more than you prefer. Combination sleepers: Roll between positions and assess whether the foam's response suits you; the current panel does not provide a measured movement score.
Original AS3 motion-transfer demonstration
A short demonstration on our older AS3 sample. It illustrates that sample and is not the standardized 2026 score.
Couples should lie down together, alternate changing positions and test the edge before relying on any motion or edge score. Room temperature, sheets and protectors also affect warmth, so the cooling score is context for the tested sample rather than a promise of a specific sleeping temperature.
Trial and warranty: the details
Amerisleep's direct sleep trial begins when the mattress arrives and runs for 100 nights. It asks customers to try the mattress for at least 30 nights before initiating a return. For eligible returns, contact the company for authorization; it says it arranges pickup rather than asking you to re-box the mattress. If a mattress and adjustable bed are ordered together, its trial page says the clock starts after the adjustable bed also arrives.
Foundations, adjustable bases and accessories do not qualify for the mattress trial. Amerisleep's terms also discuss deductions for certain free or discounted promotional items if they are not returned with the order. Check the written agreement for your purchase, and ask a different retailer about its own comfort policy before paying.
The 20-year limited mattress warranty is split into two periods: the first ten years provide repair or replacement for eligible defects, while the second ten years are prorated. The policy describes a 50% original-price charge for replacement in the latter period, with associated costs; labor and transportation are not covered in the first period either. Coverage has conditions and exclusions, so save the receipt and full terms. A defect warranty is not a promise of twenty years of comfort.
Foundation and setup checklist
- Confirm you ordered AS3 all-foam rather than AS3 Hybrid and inspect the package promptly. Amerisleep's direct terms request notice of damage, defects or incorrect items within five business days.
- Check the foundation. Amerisleep says non-Amerisleep slats should be no more than 2.75 inches apart, and it does not recommend a traditional box spring. Verify the exact support against the warranty and your frame.
- Use an appropriate protector and follow the care and opening instructions. Keep the delivery date and purchase record for the trial or a possible claim.
- Compare the mattress-only price in your selected size with the final cost of any base, shipping or promotional accessories. The article's $1,549 reference is not a live quote.
See our guide to using an older box spring for the support questions to ask before reusing your existing setup.
Which alternative should you try?
| Option | Reason to compare | What to check |
|---|---|---|
| AS3 all-foam | Medium foam feel and the existing Yawnder test record on this page | Pressure comfort and the tested model's lower edge score |
| AS3 Hybrid | Coil support with foam cushioning | Different feel and price; the all-foam test scores do not apply |
| A firmer or softer foam mattress | A different surface may suit your body and preferred positions | Compare the exact model's firmness, return terms and delivered price |
If possible, test the selected mattress with your regular pillow and compare the same size across offers. Ask the seller about fit, base compatibility and return fees rather than relying on a single overall rating.
Common questions
What did Yawnder score it? 8.4/10 overall in the current standardized record.
How firm was the tested mattress? 6/10.
How long is the trial? 100 nights.
What is the warranty? 20-year limited.
Check today's Amerisleep AS3 price and promotion →
Yawnder Reviews · Disclosure: Brand links on this page may be affiliate links. If you buy through them, Yawnder may earn a commission at no additional cost to you. Test scores come from Yawnder's standardized mattress-testing record; current policies and promotional pricing are manufacturer-provided.
Standardized test data
Every mattress in the current program follows the same rubric and order, combining instrument-measured categories with hands-on evaluations so scores are comparable across brands.
| Measurement | Result | How to read it |
|---|---|---|
| Firmness | 6 | 1–10 scale (6.5 = medium-firm) |
| Construction | Foam | Foam / hybrid / latex / airbed |
| Profile height (Yawnder measured) | Not measured | inches — measured on our own sample |
| Motion transfer | 8.8 | score /10 — higher is less disturbance |
| Edge support | 7.2 | score /10 — sitting and sleeping edge |
| Temperature | 8.2 | score /10 — higher sleeps cooler |
| Pressure relief | 8.8 | score /10 — shoulder and hip |
| Spine alignment | 8.4 | score /10 — neutral posture |
| Ease of movement | Not measured | score /10 — repositioning speed |
| Expected durability | 8.4 | score /10 — projected 5-year hold |
| Off-gassing | 8.6 | score /10 — higher is less smell |
| Queen price | $1,549 | MSRP before seasonal discounts |
| Manufacturer sleep trial | 100 nights | when bought direct from the brand |
| Manufacturer warranty | 20-Year Limited | as published by the manufacturer; applies wherever you buy |
| Last test date | August 27, 2026 | date of our most recent standardized test session |
How this score is built
Support and spine alignment 25% · pressure relief 20% · temperature 15% · motion transfer 15% · edge support 10% · durability 10% · value 5%. Scores come from standardized instrument measurements and structured hands-on evaluations using the same Yawnder testing rubric. Read the full rubric.
Find a better mattress for you
Use Yawnder's standardized test data to compare this mattress with other models, or answer a few questions and narrow the field by sleep position, feel and priorities.
Compare before you buy
Compare this mattress against 142 tested mattresses
Sort all 142 mattresses we have tested by pressure relief, support, cooling, motion isolation, edge support, price, trial and warranty, then filter by how you actually sleep. Of those, 84 hold a complete standardized record and 41 a partial standardized record.