The Amerisleep AS1 Mattress is a firm, 10-inch all-foam bed built for back sleepers and stomach sleepers who want steady support without much sink. In our testing, its simple two-layer design kept the feel flat, lifted, and easy to move on. That same firmness is the main drawback: most side sleepers will likely want more cushion at the shoulders and hips. A queen currently starts at $899.
Table of Contents
Product Overview
| Mattress | Overall Score | Pros | Cons | Ideal For |
|---|---|---|---|---|
| Amerisleep AS1 Mattress | 4.2/5 | Firm support; low motion transfer; easy repositioning | Too firm for many side sleepers; softer when sitting at the edge; limited contouring | Back and stomach sleepers; firm-foam shoppers; motion-sensitive couples |
Final Verdict
The AS1 is a straightforward firm foam mattress that kept my midsection from dipping and stayed consistent when I changed positions. Our testing showed strong alignment for back and stomach sleeping, quiet motion control, and an easy-to-move surface. The trade-off is pressure relief. If you spend most of the night on your side, the feel can become too sharp at the shoulder and hip.
Who It’s For
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Back sleepers who want a firm, flat feel
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Stomach sleepers who need more lift through the hips
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Couples who prefer low-motion foam
Who It’s Not For
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Most dedicated side sleepers
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Anyone who wants a deep, plush cradle
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Shoppers who need a rigid sitting edge
How We Tested It
We tested the AS1 over three weeks, rotating between back and side sleeping and noting lower-back tightness, hip alignment, and comfort over longer sessions. Marcus focused on heat buildup and edge use in daily routines, Mia logged extended side-sleep stretches to track pressure buildup, and Jenna and Ethan ran partner-movement drills to judge motion transfer and how quickly the surface settled. We scored support, cooling, pressure relief, motion isolation, responsiveness, edge support, and durability from repeated nightly use and basic stress checks.
Our Testing Experience
The AS1 felt firm right away. On my back, my hips stayed level and my lower back felt supported, especially on nights when I went to bed already tight from sitting at a desk. On my side, the bed pushed back faster than it cushioned, so pressure built at the shoulder sooner than I wanted. Marcus liked the way it kept his hips from dropping and said it slept a bit cooler than many all-foam beds we’ve tested. Mia, who is more sensitive at the shoulders, started shifting around sooner during longer side-sleep sessions. Jenna and Ethan both noted how little movement crossed the surface, though they also agreed the perimeter compresses more when you sit on it than when you lie near it.
What we liked
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Steady lumbar support for back and stomach sleeping
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Low motion transfer for couples
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Quick enough foam recovery to make repositioning easy
Who it is best for
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Back sleepers who prefer a firm all-foam feel
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Stomach sleepers who need the hips held up
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Couples who wake easily from partner movement
Where it falls short
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Side sleepers who need deeper pressure relief
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Anyone who sits on the edge often
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Shoppers looking for a plush memory-foam hug
Pros & Cons
| Pros | Cons |
|---|---|
| Firm, steady support for back and stomach sleepers | Too firm for most side sleepers over long stretches |
| Low motion transfer for couples | Edge compresses noticeably when sitting |
| Easy to reposition without feeling stuck | Limited plush contouring |
| Breathable surface feel for a firm all-foam bed | Not a bouncy, springy feel |
| Simple build backed by a long warranty | Needs even support and should not be used on box springs |
Details
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Price (Queen): starts at $899
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Feel: Firm (7 on the brand’s firmness scale)
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Profile height: 10"
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Construction: 2" Bio-Pur® foam over 8" Bio-Core® foam
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Mattress type: All-foam
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Cover: soft, ultra-breathable cover
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Cooling: Refresh Cooling Technology with open-cell Bio-Pur® foam
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Certifications: Bio-Pur® is CertiPUR-US® certified and low in VOCs
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Fiberglass: fiberglass-free
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Sleep trial: 100 nights, with returns available after the first 30 nights
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Shipping: free in the continental U.S.; compressed in a box via FedEx; usually arrives in two weeks or less
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Warranty: 20 years; full replacement for qualifying defects in years 1-10, prorated replacement in years 11-20
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Made in USA: made in the U.S. with U.S. and imported components; covers sewn in Canada
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Sizes: Twin, Twin XL, Full, Queen, King, Cal King, Split King
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Foundation notes: works on solid or slatted foundations with slats no more than 2.75" apart, works with adjustable bases, not compatible with box springs
Review Score
| Metric | Score | Remarks |
|---|---|---|
| Support | 4.7 | Our testing showed strong hip lift and steady lower-back support |
| Cooling | 4.0 | For a firm all-foam bed, heat buildup stayed controlled with breathable bedding |
| Pressure Relief | 3.6 | Comfortable on back and stomach; side sleeping created earlier shoulder and hip pressure |
| Motion Isolation | 4.7 | Partner movement stayed muted during turns and exits |
| Responsiveness | 4.1 | The foam recovered fast enough that changing positions took little effort |
| Edge Support | 3.6 | Sleep surface stayed usable near the edge, but sitting compressed it more |
| Durability | 4.5 | Simple two-layer build and long warranty suggest solid long-term support |
| Overall | 4.2 | Best for firm-preference back and stomach sleepers who value stability over plushness |
Choosing Guide
Use this as a how to choose a mattress checkpoint: the AS1 makes the most sense if you sleep mostly on your back or stomach, want a firmer surface, and care more about alignment than cushioning depth. It also makes sense if you share a bed and want quiet motion control without a slow, stuck-in-foam feel. The main trade-off is pressure relief for side sleeping and a softer sitting edge.
If you are lighter, more pressure-sensitive, or mostly sleep on your side, the Amerisleep AS3 is the safer fit because it offers more cushioning. If you still want a firmer overall feel but prefer a stronger edge and more spring-like response, the Saatva Classic in Firm is another model worth comparing.
Limitations
This is a very firm mattress, so it can feel too flat and forceful for side sleepers who need deeper sink at the shoulder. The edge is adequate for sleeping near it, but it compresses when you sit on it to get dressed. Shoppers chasing a plush, slow-melting memory foam feel will likely find the AS1 too restrained.
Vs. Alternatives
Why choose these models
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Firm all-foam support that resists hip dip
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Easy repositioning without deep sink
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Quiet surface for shared sleep
Alternatives to consider
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Brooklyn Bedding Plank Firm Mattress: for an even firmer feel
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Tempur-Pedic TEMPUR-Adapt Mattress: for deeper, denser contouring
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Saatva Loom & Leaf Mattress: for a plusher memory-foam cradle
Pro Tips
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Give yourself an adjustment window before judging comfort on a firmer bed.
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If you are a side sleeper but still want the AS1, try a thin topper rather than a thick one.
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Rotate the mattress every three to six months to help wear stay even
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Use a solid platform or slats spaced no more than 2.75 inches apart.
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Skip box springs; the mattress needs flatter, more even support.
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Use breathable sheets and lighter bedding if you want the coolest setup.
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If you share the bed, expect low motion transfer but a softer sitting edge.
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Unbox it on the foundation if possible so you are not moving it twice.
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Keep pillow loft moderate if stomach sleeping is your main position.
FAQs
Is the Amerisleep AS1 Mattress good for side sleepers?
In our testing, it felt too firm for long side-sleep stretches because pressure built at the shoulder and outer hip faster than on a softer model. If side sleeping is your main position, a more cushioned mattress is usually the better choice.
Does the Amerisleep AS1 Mattress sleep hot?
For a firm all-foam bed, it stayed reasonably comfortable because you do not sink as deeply into the surface. It still performed best with breathable sheets and lighter bedding, especially for hot sleepers.
How is motion isolation for couples?
Motion control was one of its better traits in our testing. Turns and exits stayed muted enough that partner movement did not travel far across the bed, which is useful for couples.
What base works best with the Amerisleep AS1 Mattress?
A solid or slatted foundation works well, as long as slat gaps stay within 2.75 inches. It also flexes well on an adjustable base, but it should not be used on a box spring.
