by Amerisleep AS3 vs AS4 2026: Why AS4 Was Discontinued + What Replaces It
Amerisleep retired the AS4 in 2022–2023 as part of a deliberate lineup consolidation. The upgraded AS3 now covers every need the AS4 addressed—and does it better, with HIVE zoned support and refined Bio-Pur foam the original AS4 never had. If you owned an AS4 or were considering one, this guide tells you exactly what changed and which mattress makes sense now.
TL;DR — AS4 Is Gone. Here Is What You Need to Know.
Amerisleep AS4 (Discontinued 2022–2023)
- Medium-soft 4/10 firmness
- Bio-Pur foam, 12” all-foam
- No HIVE zoning
- $1,499 queen at discontinuation
- No longer available anywhere
Amerisleep AS3 (Current Replacement)
- Medium 5/10 firmness (slightly firmer)
- Upgraded Bio-Pur + HIVE 5-zone support
- 12” all-foam (same height)
- $1,449 → $1,015 queen (30% off)
- 80% similar feel, meaningfully better support
Bottom line: Former AS4 owners should buy the AS3. If the AS4 felt slightly too soft, consider the AS2. If you want the softest possible feel, the AS5 Hybrid is the right direction. All details below.
What this guide covers
The Amerisleep AS4: What It Was
The AS4 occupied a medium-soft position in Amerisleep’s original lineup—firmness rated at 4/10, sitting between the medium AS3 (5/10 at the time) and the plush AS5 (3/10). It was a 12-inch all-foam build using Bio-Pur plant-based memory foam with a standard base layer. The queen sold for $1,499 before Amerisleep ran any promotional pricing.
Amerisleep AS4 Specifications (Discontinued) DISCONTINUED
- Firmness: Medium-soft 4/10
- Construction: 12” all-foam — Bio-Pur comfort layer + base foam
- Foam type: Bio-Pur (plant-based, no HIVE zoning)
- Zoning: None — uniform surface, no targeted lumbar or hip zones
- Certifications: CertiPUR-US
- Trial / Warranty: 100 nights / 20-year warranty
- Queen price at discontinuation: $1,499
- Status: No longer manufactured or available new
The AS4 found a loyal segment: side sleepers and lighter combo sleepers who found the AS3 too firm and the AS5 too soft. That 4/10 medium-soft sweet spot worked for shoulder and hip pressure relief without the full plush feel of the AS5. When Amerisleep retired the model, buyers in that firmness range had to find an alternative.
For the full archived review, see our Amerisleep AS4 review. For a broader look at the lineup, see all Amerisleep mattress reviews.
Why Amerisleep Discontinued the AS4
Amerisleep did not discontinue the AS4 due to quality issues. The decision was strategic, driven by four factors that made a consolidated five-model lineup make more sense than a six-model one.
Lineup simplification
A five-model AS1–AS5 range (firm to soft) is easier for buyers to navigate than six models. The AS4’s 4/10 medium-soft position was close enough to the upgraded AS3’s 5/10 that the overlap created decision confusion rather than meaningful choice.
HIVE upgrade eliminated the gap
The original AS3 lacked HIVE zoned support. Once Amerisleep added HIVE to the AS3, the upgraded model delivered better targeted pressure relief at the hip and shoulder than the non-zoned AS4 ever could—making the AS4 redundant from an engineering standpoint.
Bio-Pur refinement
The Bio-Pur formula in the current AS3 is a later-generation compound than what shipped in the AS4. Better thermal performance and more progressive compression are two areas where the updated foam outperforms the original AS4 build.
Operational efficiency
Fewer SKUs mean faster product development cycles, lower inventory carrying costs, and tighter quality control per model. Amerisleep has been able to invest more in the remaining five models as a result of the AS4 retirement.
The net effect: AS4 owners who upgrade to the current AS3 are getting a mattress that is meaningfully better in two dimensions (HIVE zoning, refined Bio-Pur) and only marginally firmer (5/10 vs 4/10). For most former AS4 users, that half-step firmness difference is imperceptible.
Upgraded AS3: What It Has That the AS4 Never Did
The AS3’s HIVE (Harnessing Intelligent Ventilation & Energy) technology is the most significant difference. HIVE creates hexagonal cutouts across five body zones in the Bio-Pur comfort layer. The result is a surface that is firmer under the lumbar region (to support spinal alignment) and softer at the hip and shoulder zones (to relieve pressure). The AS4’s uniform foam surface could not do this—it delivered the same compression response across the entire body contact area.
For side sleepers, this matters. The AS4’s undifferentiated softness at 4/10 worked because the foam gave everywhere. The AS3’s HIVE zoning at 5/10 achieves the same hip and shoulder relief through targeted engineering rather than overall softness. The lumbar zone stays firmer, which reduces the spinal curve that develops when the lower back sinks into soft foam without resistance.
Upgraded AS3 Specifications (Current Replacement)
- Firmness: Medium 5/10 (one half-step firmer than AS4’s 4/10)
- Construction: 12” all-foam — Bio-Pur + HIVE layer + transition foam + base
- HIVE zoning: 5-zone targeted support (lumbar firm, hip/shoulder soft)
- Foam type: Refined Bio-Pur (later-generation plant-based formulation)
- Thermal performance: +1.4°F above ambient (improved vs AS4-era Bio-Pur)
- Certifications: CertiPUR-US, OEKO-TEX Standard 100
- Trial / Warranty: 100 nights / 20-year warranty
- Queen price: $1,449 → $1,015 (30% off current promotion)
For the full current review: Amerisleep AS3 review. If you want the hybrid version: Amerisleep AS3 Hybrid review 2026.
Former AS4 Buyer’s Guide: Which Mattress Now
The AS4’s medium-soft 4/10 sat in a specific comfort range. Where you land on the firmness spectrum, and what you wanted from the AS4, determines which current Amerisleep model is correct for you.
Amerisleep AS3 — If You Liked the AS4
$1,449 → $1,015 queen (30% off)
If the AS4 worked for you, the AS3 is the correct replacement. The feel is 80% similar: Bio-Pur foam, 12-inch all-foam construction, same 100-night trial and 20-year warranty. The AS3 runs one half-step firmer (5/10 vs 4/10), which the vast majority of former AS4 users report is imperceptible in practice. What you gain over the AS4 is meaningful: HIVE zoning provides targeted lumbar support and hip/shoulder pressure relief the AS4 lacked, and the refined Bio-Pur formula runs marginally cooler.
Choose the AS3 if: the AS4 felt right, you sleep on your side or switch positions, your weight is under 230 lb, or you want the closest available feel to what you had.
Amerisleep AS5 Hybrid — Maximum Pressure Relief
$1,849 → $1,294 queen (30% off)
The AS5 sits at 3/10 firmness—one full step softer than the discontinued AS4. If you always found the AS4 on the firmer side of acceptable, or if your weight is above 200 lb and you side sleep, the AS5 Hybrid delivers maximum pressure relief. The hybrid configuration adds pocketed coils beneath the Bio-Pur and HIVE layers, providing edge support and airflow that the all-foam AS4 and AS3 cannot match. The $279 premium over the AS3 is justified if pressure relief is the primary need.
Choose the AS5 Hybrid if: the AS4 felt marginally too firm, you are a strict side sleeper above 200 lb, or you want coil edge support for mobility or stretching use.
Amerisleep AS2 — If AS4 Felt Too Soft
$1,049 queen
If you owned an AS4 but found yourself sleeping best when you rolled onto your back or stomach, or if the 4/10 medium-soft feel never felt quite supportive enough, the AS2 at 7/10 firmness is a better fit. Back and stomach sleepers need firmer resistance to maintain anterior pelvic tilt and prevent lumbar bridging—neither the AS4 nor the AS3 delivers that consistently. The AS2 costs $1,049, making it the most accessible Amerisleep model currently available, and it retains Bio-Pur foam and HIVE zoning.
Choose the AS2 if: you primarily sleep on your back or stomach, the AS4 felt borderline soft, or you want firm spinal support at the lowest price in the lineup.
AS4 vs AS3 vs AS5: Side-by-Side
| Feature | AS4 (Discontinued) | AS3 (Current) | AS5 Hybrid (Softest) |
|---|---|---|---|
| Status | Discontinued 2022–23 | Available | Available |
| Firmness | 4/10 Medium-Soft | 5/10 Medium | 3/10 Plush |
| Height | 12” | 12” | 13” |
| Construction | All-foam | All-foam | Foam + pocketed coils |
| Bio-Pur foam | Yes (original formula) | Yes (refined formula) | Yes (refined formula) |
| HIVE zoning | No | Yes (5-zone) | Yes (5-zone) |
| Edge support | Foam edge only | Foam edge only | Coil perimeter reinforced |
| Cooling | Bio-Pur (original) | Bio-Pur (improved) | Bio-Pur + coil airflow |
| Queen price | $1,499 (historical) | $1,449 → $1,015 | $1,849 → $1,294 |
| Trial / Warranty | 100 nights / 20 yr | 100 nights / 20 yr | 100 nights / 20 yr |
| Best for | N/A | Former AS4 buyers, combo sleepers | Strict side sleepers, 200+ lb |
FAQ: Amerisleep AS3 vs AS4 Transition
Was the Amerisleep AS4 discontinued because of quality problems?
No. Amerisleep discontinued the AS4 as part of a deliberate lineup consolidation, not due to quality or durability issues. The company collapsed from six models to five (AS1 through AS5) to simplify the buying process, reduce SKU complexity, and invest more development resources in each remaining model. The upgraded AS3 with HIVE zoning made the AS4’s position in the lineup redundant.
Is the Amerisleep AS3 a good replacement for the AS4?
Yes, for the vast majority of former AS4 buyers. The AS3 is one half-step firmer (5/10 vs 4/10), but the HIVE zoning adds targeted hip and shoulder pressure relief that partially compensates for the firmness difference at those body zones. Most AS4 owners who switch to the AS3 report no meaningful difference in comfort—and gain noticeably better lumbar support from the zoning system.
What is HIVE zoning and why did the AS4 not have it?
HIVE (Harnessing Intelligent Ventilation & Energy) is Amerisleep’s five-zone support system that creates hexagonal cutouts in the Bio-Pur comfort layer. The lumbar zone uses fewer, larger cutouts for firmness. The hip and shoulder zones use more, smaller cutouts for softness. The AS4 predates HIVE as a standard feature across the lineup—it shipped with a uniform foam surface that applied the same compression response everywhere.
Can you still buy the Amerisleep AS4 anywhere?
No. Amerisleep no longer manufactures the AS4. It does not appear on the Amerisleep website or through authorized retailers. Occasional third-party resellers may list used or open-box units, but Amerisleep cannot guarantee warranty coverage on those. The AS3 is the correct current-generation option for anyone who would have purchased the AS4.
Is the AS3 or AS5 Hybrid closer to the AS4 feel?
The AS3 is closer in feel. The AS4 was 4/10 medium-soft; the AS3 is 5/10 medium—a half-step difference. The AS5 Hybrid is 3/10 plush, a full step softer than the AS4 in the other direction. For most former AS4 users, the AS3 replicates about 80% of the feel with added HIVE support. The AS5 Hybrid is only the right choice if the AS4 consistently felt too firm.
What is the price difference between the AS4 and AS3 today?
The AS4 sold for $1,499 queen at its discontinuation price. The current AS3 lists at $1,449 and is available at $1,015 with Amerisleep’s standard 30% promotional discount. That puts the AS3 at $43 less than the AS4 historically, with HIVE zoning and an upgraded Bio-Pur formula that the AS4 never received.
What weight range does the AS3 support for former AS4 buyers?
The AS3 performs well for sleepers up to approximately 230 lb across combination sleeping positions. Side sleepers above 230 lb will find the AS3 firmness borderline—at that weight range, the AS5 Hybrid’s coil-reinforced base provides more stable pressure relief under sustained load. Back sleepers above 200 lb who need firm support should consider the AS2 instead.
Did Bio-Pur foam change between the AS4 and the current AS3?
Yes. The Bio-Pur in the current AS3 is a later-generation formulation compared to what shipped in the AS4. The refined formula runs marginally cooler (Amerisleep’s thermal data puts current Bio-Pur at +1.4°F above ambient vs higher readings for the older formulation) and compresses more progressively, reducing abrupt positional transitions during sleep.
Is the AS3 Hybrid a better option for former AS4 buyers than the all-foam AS3?
For most former AS4 buyers, the all-foam AS3 is sufficient and the right economic choice. The AS3 Hybrid adds pocketed coils beneath the Bio-Pur and HIVE layers, primarily delivering edge support for stretching and improved airflow. If you used the AS4’s edge actively or found any all-foam mattress borderline warm, the AS3 Hybrid is worth the premium. For straight comfort replication of the AS4 feel, the all-foam AS3 is the closer match. See the full AS3 Hybrid review 2026.
How does the AS3 trial and warranty compare to what the AS4 offered?
They are identical. The AS4 shipped with a 100-night trial and 20-year warranty. The current AS3 carries the same terms. Nothing was lost in the transition from an after-purchase protection standpoint. The trial gives you 100 nights to evaluate whether the AS3’s firmness works as an AS4 replacement before committing.
Verdict
Short answer: buy the AS3
Amerisleep retired the AS4 to strengthen the AS3, not to leave buyers without an option. The upgraded AS3 with HIVE zoning delivers better targeted pressure relief than the non-zoned AS4, runs on a refined Bio-Pur formula, and costs $43 less than the AS4 did at its final retail price—before accounting for the 30% promotional discount that brings it to $1,015.
Former AS4 owners: The AS3 is your replacement. The half-step firmness difference (5/10 vs 4/10) is minor in practice, and the HIVE zoning compensates at the pressure points that matter for side and combo sleepers.
If the AS4 felt too soft: The AS2 at 7/10 is the right direction. Back and stomach sleepers above 180 lb will find cleaner spinal alignment on the AS2’s firmer surface.
If the AS4 felt marginally too firm: The AS5 Hybrid at 3/10 adds plush pressure relief with a coil base for stability. The $279 premium over the AS3 is justified for strict side sleepers above 200 lb.
AS4 Discontinued. AS3 Is the Upgrade.
Current promotion: AS3 queen at $1,015 (30% off $1,449). HIVE zoning, refined Bio-Pur, 20-year warranty, 100-night trial.