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Quick Answer: Amerisleep sells five numbered foam mattresses (AS1 through AS5) plus hybrid versions of each (ASHX). Higher number = softer. AS1 is extra-firm for stomach sleepers. AS2 is medium-firm for back sleepers. AS3 is medium for combo sleepers (the bestseller). AS4 is medium-soft for side sleepers. AS5 is plush-soft for lightweight side sleepers. All use plant-based Bio-Pur memory foam. Queen prices range $1,299 (AS1) to $2,899 (AS5 Hybrid).
⚡ TL;DR — Key Takeaways
- Avocado Green is GOTS-certified organic latex and wool hybrid
- Vegan model swaps wool for organic cotton
- Avocado Luxe adds extra Talalay latex layer
- Pillow-top versions available on all models
- 1-year trial and 25-year warranty industry-leading
Amerisleep’s Numbered Firmness System
Amerisleep simplifies a typically confusing decision: rather than naming its mattresses with poetic labels (Cloud, Dream, Luxe, etc.), it numbers them AS1 through AS5. Higher number = softer mattress. The numbering corresponds roughly to a 10-point industry firmness scale: AS1 is 8/10 (extra-firm), AS3 is 5.5/10 (medium), AS5 is 3/10 (plush-soft).
Why This Matters Today: Most online mattress brands force shoppers to guess from marketing descriptions (“medium-plush luxury pillow-top”). Amerisleep’s system makes sleep-style matching explicit — pick your number based on weight and sleep position, and you will reliably get a predictable feel. It is one of the clearest firmness systems in the US mattress market.
The Full AS Lineup Explained
AS1 — Extra Firm
8/10 firmness. For dedicated stomach sleepers, lower-back-pain sufferers wanting maximum support, and heavy sleepers (250+ lbs) who bottom out softer mattresses. Queen $1,299 all-foam; $1,799 hybrid (AS1HX).
AS2 — Medium Firm
7/10 firmness. For back sleepers and back-sleeper-dominant combo sleepers. Firm enough to maintain spinal alignment but with a slight top-layer softness. Queen $1,599 / $2,099 hybrid.
AS3 — Medium (Flagship)
5.5/10 firmness. The bestseller. Suits combo sleepers, couples with mixed preferences, and the widest range of body weights. Queen $1,899 / $2,399 hybrid.
AS4 — Medium Soft
4/10 firmness. For side sleepers of average weight (140–200 lbs) who need pressure relief at shoulders and hips without bottoming out. Queen $2,099 / $2,599 hybrid.
AS5 — Plush Soft
3/10 firmness. For lightweight side sleepers (under 140 lbs) and anyone wanting maximum body-hug. Queen $2,299 / $2,899 hybrid. Uses an active-flex layer beneath the memory foam to prevent bottoming out.
Firmness and Fit Table
| Model | Firmness | Sleep Position | Weight Range | Queen Foam | Queen Hybrid |
|---|---|---|---|---|---|
| AS1 | 8/10 | Stomach | 250+ lbs | $1,299 | $1,799 |
| AS2 | 7/10 | Back | 160–230 lbs | $1,599 | $2,099 |
| AS3 | 5.5/10 | Combo | 130–230 lbs | $1,899 | $2,399 |
| AS4 | 4/10 | Side | 140–200 lbs | $2,099 | $2,599 |
| AS5 | 3/10 | Side (light) | under 140 lbs | $2,299 | $2,899 |
Bio-Pur Plant-Based Memory Foam
Every Amerisleep mattress uses Bio-Pur, a memory foam where a portion of the petroleum-derived polyol is replaced with plant-based alternatives (typically soybean or castor oil derivatives). The substitution usually sits in the 15–25% range by weight. Bio-Pur claims improved breathability and faster responsiveness compared to traditional memory foam.
What Bio-Pur Actually Changes
The plant-based substitution slightly reduces heat retention (the open-cell structure of Bio-Pur is about 10× more breathable than traditional closed-cell memory foam) and slightly speeds response time. It does not make the foam organic — the finished product is still mostly petroleum-derived polyurethane. The marketing overstates the environmental benefit somewhat, but the breathability improvement is real.
Key Insight: “Plant-based memory foam” is not the same as “plant-based mattress.” Bio-Pur replaces 15–25% of the polyol with plant derivatives; it is a conventional polyurethane product with partial substitution. For shoppers wanting genuinely natural materials, look at Avocado (GOLS-certified latex) instead. For better memory foam breathability within the conventional category, Amerisleep is legitimate.
AS3 Is the Flagship
AS3 sells about 40% of Amerisleep’s total volume because it fits the widest audience — combo sleepers, couples with different preferences, and average-weight back-or-side sleepers. The 5.5/10 firmness has enough top-layer softness for side-sleeping while maintaining spinal support for back-sleeping. If you are unsure which AS model fits you, AS3 is the safest default.
AS3 Foam vs AS3 Hybrid
The AS3 all-foam is cheaper but runs slightly warmer and has more noticeable body-hug. AS3 Hybrid (called AS3HX) adds pocket coils under the foam for better cooling, bounce, and edge support. Most shoppers over 180 lbs should pay the $500 upgrade to hybrid.
Hybrid (HX) vs All-Foam Across the Line
Every AS model is available in both all-foam and hybrid (HX) versions. The hybrid adds a pocket-coil base, typically priced $500 more per model. Benefits: better cooling (coil airflow), firmer edge support, and better long-term support for heavier sleepers. Cost: more expensive, slightly more motion transfer.
Red Flag: AS5 all-foam can bottom out under sleepers over 180 lbs. The 3/10 firmness with minimal support beneath puts more weight on the base foam than it can handle long-term. If you want the plush feel at higher body weight, choose AS5 Hybrid — the coil base prevents bottoming.
Durability and Warranty
Amerisleep offers a 20-year warranty on all AS models. The first 10 years cover full replacement; years 11–20 prorate the cost. Typical real-world useful life is 10–15 years. Bio-Pur’s open-cell structure compresses slightly faster than traditional dense memory foam — figure on 10–12 years for AS1 through AS3, closer to 8–10 for AS5 if used by sleepers near the upper weight limit.
Trial, Shipping, and Return Policy
Amerisleep offers a 100-night sleep trial with a 30-night break-in requirement. Returns are free within the trial. All mattresses ship compressed in a box; white-glove delivery is available for $150. The warranty is 20 years covering manufacturing defects and sag greater than 0.75″ — a tighter sag threshold than most competitors.
Green Flag: Amerisleep publishes exact foam density in lbs/cuft for every AS model on the product page. The AS3 comfort foam is 4.0 lb density; AS5 uses 4.5 lb density (the softer models actually use denser foam to prevent bottoming). This level of spec transparency signals real confidence in the product.
Amerisleep vs Nectar vs Tuft & Needle
At the $1,500–$2,000 queen range, Amerisleep competes with Nectar Premier, Tuft & Needle Mint, and Leesa Original Hybrid.
Amerisleep AS3
Best if you want explicit firmness matching. Bio-Pur is slightly more breathable than standard memory foam. 20-year warranty.
Nectar Premier
Lower price ($1,499). Medium-firm only — no firmness options. 365-night trial.
Tuft & Needle Mint
Three-layer polyfoam (no memory foam). Firmer feel. 100-night trial.
Who Each AS Fits Best
Pick AS1 If
You are a dedicated stomach sleeper, you have lower-back pain relieved by firm surfaces, or you weigh over 250 lbs.
Pick AS2 If
You sleep primarily on your back and want spinal support with light comfort padding.
Pick AS3 If
You are unsure. You are a combo sleeper. You share a bed with a partner who has a different preference. This is the safe default.
Pick AS4 If
You sleep on your side, weigh 140–200 lbs, and need pressure relief at shoulders and hips.
Pick AS5 If
You are a light side sleeper (under 140 lbs) wanting maximum plush feel. Always pick the hybrid version if you are over 140 lbs.
Frequently Asked Questions
Q: Is Bio-Pur organic or certified natural?
No. Bio-Pur replaces 15–25% of petroleum polyol with plant-based alternatives. It is CertiPUR-US certified but not GOTS or GOLS certified. For certified organic, consider Avocado or Naturepedic instead.
Q: What is the difference between AS3 and AS3HX?
AS3HX adds a pocket-coil base under the Bio-Pur foam layers. Better cooling, firmer edge, $500 more expensive. Recommended for sleepers over 180 lbs or anyone prioritizing cooling.
Q: How long does an Amerisleep AS mattress last?
Typical useful life is 10–15 years. The 20-year warranty covers full replacement for the first 10 years, prorated after that. Sag over 0.75″ is covered.
Q: Is AS3 the best-selling Amerisleep?
Yes. AS3 accounts for roughly 40% of Amerisleep’s total volume because its 5.5/10 firmness fits combo sleepers and couples with mixed preferences.
Q: Is Amerisleep made in the USA?
Yes. All Amerisleep mattresses are manufactured in US factories using CertiPUR-US certified foams.
Practical Buying Notes
Amerisleep runs promotional discounts of 30% off roughly every month. Never pay full MSRP — target AS3 at around $1,400 foam or $1,800 hybrid after discount. The numbered system means you can confidently pick by sleep position without needing to test the mattress first, which removes most of the online-mattress buying risk.
The Verdict
Amerisleep’s numbered AS1–AS5 system is the clearest firmness-matching framework in the US mattress market. AS3 is the safe default for combo sleepers and couples; AS3HX (hybrid) is the recommended upgrade for sleepers over 180 lbs. Bio-Pur is a real breathability improvement over traditional memory foam but not truly natural. The 20-year warranty with 0.75″ sag coverage is one of the strongest durability guarantees in the direct-to-consumer market. Skip Amerisleep only if you want organic certification or true innerspring bounce.
