Amerisleep AS2 vs Amerisleep AS4
Detailed side-by-side comparison — pricing, specs, performance ratings, and our pick.
| Feature | Amerisleep AS2 | Amerisleep AS4 |
|---|---|---|
| Overview | ||
Type | Memory Foam | foam |
Firmness 1 = softest, 10 = firmest | 6.5 / 10 | 3.5 / 10 |
Queen Price Current / sale price | $1,049 | $1,149 |
Trial Period Return window | 100 nights | 100 nights |
Warranty | 20 years | 20 years |
| Performance Ratings | ||
Cooling Hot sleepers | 8/10 | Average |
Motion Isolation Partners, light sleepers | 9/10 | Excellent |
Pressure Relief Hip/shoulder pain | 7/10 | Excellent |
Edge Support Sit/sleep near edge | 6/10 | Average |
Durability Long-term performance | 5/10 | Good |
| Compatibility & Features | ||
Adjustable Base Head/foot elevation | ✓ Yes | ✓ Yes |
Split King Support Two Twin XL per couple | ✓ Yes | ✓ Yes |
Dual Comfort Zones Different firmness per side | — | — |
Smart Features App, sensors, auto-adjust | — | — |
Financing | Affirm, Klarna | Available |
| Materials & Safety | ||
Certifications Organic / non-toxic | CertiPUR-US | None listed |
Off-Gassing New-foam smell concern | CertiPUR-US certified foam | — |
| Best For | ||
Ideal sleeper profiles |
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| Actions | ||
Need Help Deciding?
For most sleepers, we recommend the Amerisleep AS4 over the Amerisleep AS2. It scores higher in cooling, motion isolation, pressure relief and delivers stronger overall value. The Amerisleep AS2 is the better choice only if you specifically prefer a firmer, more supportive feel.
Amerisleep AS2 vs Amerisleep AS4: What Actually Differs
The Amerisleep AS2 is a memory foam build, while the Amerisleep AS4 is a foam (plant-based_memory_foam vs memory-foam) — that single difference drives most of the cooling, motion, and feel decisions below. Profile-wise they're almost identical — the Amerisleep AS2 measures 12" and the Amerisleep AS4 measures 12", so neither will dictate your sheet depth or bed-frame compatibility. The Amerisleep AS2 is the firmer of the two at 6.5/10 (medium-firm), and the Amerisleep AS4 sits at 3.5/10 (medium-soft) — a meaningful enough gap that sleeper position and weight should drive the choice. On a Queen, the Amerisleep AS2 runs $1,049 versus $1,149 for the Amerisleep AS4 — roughly $100 (9%) less, which is enough to factor into the decision unless the pricier model wins clearly on the specs you care about.
Which Is Better For Your Sleep Style?
Pressure-relief data not available for one or both mattresses — spec not available.
Firmness of 6.5/10 is closer to the medium-firm sweet spot back sleepers need for lumbar support (vs 3.5/10).
Firmer at 6.5/10 vs 3.5/10 — stomach sleepers need the extra support to keep the pelvis from sinking and arching the lower back.
Cooling rating not available for one or both mattresses — spec not available.
Durability and edge-support ratings not available — spec not available.
Softer at 3.5/10 vs 6.5/10 — lighter sleepers compress less, so they typically need the softer of two options to get proper contouring.
Motion-isolation data not available for one or both mattresses — spec not available.
Price Comparison (Queen)
| Mattress | MSRP | Current | Sale? |
|---|---|---|---|
| Amerisleep AS2 | $1,549 | $1,049 | Save $500 |
| Amerisleep AS4 | $1,649 | $1,149 | Save $500 |
The Amerisleep AS2 is the budget choice at $1,049 — $100 less than the Amerisleep AS4 ($1,149). That's a 9% gap, which is worth weighing against the spec differences before deciding which delivers better value for your situation. Both are currently below MSRP.
Amerisleep AS2
Strengths
- ✓Medium-firm support for back and stomach sleepers
- ✓Bio-Pur foam is more responsive and breathable than conventional memory foam
- ✓HIVE zoning adds targeted cushion and support
Considerations
- —May feel firm for side sleepers who want deep shoulder relief
- —All-foam build has less edge reinforcement than Amerisleep hybrid models
- —Split King is sold, but no separate split-king-dual SKU is published
Amerisleep AS4
Strengths
- ✓Medium-soft feel excellent for side sleepers who need shoulder and hip relief
- ✓HIVE® hex cutouts in the base layer provide zoned support
- ✓Plant-based Bio-Pur foam more breathable than traditional memory foam
Considerations
- —Too soft for stomach sleepers — spinal alignment risk
- —All-foam — less breathable than AS4 hybrid (when available)
Who Should Buy Which?
Choose the Amerisleep AS2 if you…
- →Organic / non-toxic priority shoppers
- →Firmer support seekers
Choose the Amerisleep AS4 if you…
- →Hot sleepers
- →Couples / light sleepers
- →Side sleepers / pressure relief
- →Sitting near the edge