by Novosbed
Canadian memory foam. Comfort+ kit adjustable firmness (Soft/Medium/Firm). 11" all-foam, 120-night trial, 15-year warranty. Best motion isolation: 9.2/10.
Amerisleep AS3
Bio-Pur plant memory foam. HIVE zoned pressure relief. 12" all-foam, 100-night trial, 20-year warranty. Best cooling: 9.0/10. From ~$1,015 with 30% off.
Quick Verdict (TL;DR) — Choose by Use Case
Novosbed ($1,199 queen) and Amerisleep AS3 ($1,015 queen at 30% off) are both all-foam memory mattresses priced within $200 of each other at current promotions. Novosbed’s defining feature is post-purchase firmness adjustment via the Comfort+ kit — a physical topper insert that shifts the feel between Soft, Medium, and Firm without buying a new mattress. Amerisleep AS3’s defining feature is Bio-Pur plant-based foam, which delivers measurably better cooling and HIVE zoned pressure relief. These two advantages do not overlap: the correct choice depends entirely on whether firmness flexibility or raw cooling and pressure performance matters more to you.
Choose Novosbed if you want:
- Adjustable firmness after purchase (Comfort+ kit)
- Best motion isolation: 9.2/10
- 120-night trial (20 nights longer than AS3)
- Made-in-Canada construction
- Slightly better price at list ($1,199 vs $1,449)
- Flexibility to change firmness if sleep needs shift
Choose Amerisleep AS3 if you want:
- Best cooling: Bio-Pur plant foam 9.0/10 vs 8.5/10
- Best pressure relief: 9.2/10 with HIVE zoning
- Better edge support: 8.0/10 vs 7.5/10
- Longer warranty: 20 years vs 15 years
- ~$1,015 at 30% sale (cheaper than Novosbed list)
- Celliant® fiber cover for heat conversion
What this comparison covers
Side-by-Side Specs
Novosbed and Amerisleep AS3 are both 11–12" all-foam memory mattresses targeting the $1,000–$1,500 queen price band. They share a category but diverge sharply on their core engineering approach. Novosbed prioritizes adaptability post-purchase through its proprietary Comfort+ system. Amerisleep AS3 prioritizes thermal and pressure performance through Bio-Pur plant chemistry and HIVE zoned support architecture. Understanding which problem each mattress solves makes the choice straightforward for most buyers.
| Spec | Novosbed | Amerisleep AS3 |
|---|---|---|
| Price (queen, list) | $1,199 | $1,449 (~$1,015 with 30% off) |
| Construction | 11" all-foam memory foam | 12" all-foam, Bio-Pur plant foam |
| Firmness options | Soft / Medium / Firm via Comfort+ kit | Fixed Medium (5/10) |
| Customization | YES — post-purchase Comfort+ insert | No |
| Cooling layer | Traditional memory foam (no plant chemistry) | Bio-Pur open-cell plant foam |
| Support zoning | No dedicated zoned layer | HIVE hex cutout transition layer |
| Trial period | 120 nights | 100 nights |
| Warranty | 15 years | 20 years |
| Country of manufacture | Canada | USA |
| Cover | Tencel™ bamboo blend | Celliant® infrared fiber |
| Delivery | Free ground (compressed box) | Free ground (compressed box) |
| Best for | Couples, adjustable firmness seekers, budget-flexible buyers | Hot sleepers, side sleepers, hip/shoulder pain |
Construction Breakdown
Novosbed: Adjustable Memory Foam Stack
- Top comfort layer: Gel-infused memory foam (pressure relief)
- Transition: High-density support foam
- Base: High-density core foam
- Total height: 11"
- Cover: Tencel™ bamboo blend (moisture-wicking)
- Comfort+ kit: Additional firmness insert (Soft/Medium/Firm) ordered separately
Novosbed’s construction is conventional high-density memory foam with gel infusion for basic heat dissipation. The differentiator is not the foam chemistry but the Comfort+ system: a physical insert layer that sits within the mattress cover to shift the surface feel. Ordering a Comfort+ kit after delivery costs nothing extra if done within the trial period; it ships within a few business days. The Tencel bamboo cover is moisture-wicking and adds to surface breathability above the foam layer. At 11", Novosbed is one inch shorter than the AS3, which has no meaningful sleep impact but slightly reduces edge profile.
Amerisleep AS3: Bio-Pur Zoned Foam Stack
- Top comfort layer: Bio-Pur plant-based memory foam (open-cell, cooler)
- Transition: HIVE (Harnessing Intelligent Ventilation & Energy) zoned foam
- Base: Bio-Core high-density support foam
- Total height: 12"
- Cover: Celliant® infrared fiber (heat conversion)
Bio-Pur replaces a portion of petroleum-derived chemicals with plant oils, producing an open-cell foam structure that circulates air rather than trapping it. In testing, this results in measurably lower surface temperatures versus gel-infused conventional memory foam at comparable densities. The HIVE transition layer uses hexagonal cutouts calibrated to create differentiated firmness zones: softer under high-pressure areas (shoulders, hips) and firmer under load-bearing areas (lumbar, legs). This zoned differentiation is the structural mechanism behind the AS3’s 9.2/10 pressure relief score — a score driven by engineering rather than softness alone. The Celliant cover adds an infrared heat conversion layer at the sleep surface.
The construction comparison reveals the fundamental trade-off: Novosbed gives you the ability to change your mind post-purchase (firmness flexibility via Comfort+), while AS3 gives you optimized fixed performance in cooling and pressure relief that the Novosbed’s conventional foam cannot match structurally. See Amerisleep mattress reviews for how the full AS line compares by pressure and cooling performance.
30-Night Test Results
MattressNut tested both mattresses over 30 nights each using three rotating sleeper profiles (side sleeper 130 lbs, combination sleeper 175 lbs, back sleeper 195 lbs) in our climate-controlled sleep lab. Novosbed was tested in its Medium configuration (no Comfort+ insert) to provide a direct comparison with AS3’s fixed Medium feel. Pressure mapping and 8-hour heat-pad cooling tests were run for each mattress. Scores reflect observed data, not manufacturer claims.
Novosbed scores (Medium config):
Amerisleep AS3 scores:
| Category | Novosbed | Amerisleep AS3 | Winner |
|---|---|---|---|
| Pressure relief (side, 130 lb) | 9.0 / 10 | 9.2 / 10 | Amerisleep AS3 |
| Cooling (8h heat-pad) | 8.5 / 10 | 9.0 / 10 | Amerisleep AS3 |
| Motion isolation | 9.2 / 10 | 9.0 / 10 | Novosbed |
| Edge support | 7.5 / 10 | 8.0 / 10 | Amerisleep AS3 |
| Firmness flexibility | Yes (Comfort+ kit) | No (fixed Medium) | Novosbed |
| Trial period | 120 nights | 100 nights | Novosbed |
| Warranty | 15 years | 20 years | Amerisleep AS3 |
Category Head-to-Head
Pressure Relief — Amerisleep AS3 Wins (9.2 vs 9.0)
Both mattresses score above 9.0 on pressure relief, which puts them in the top tier for side sleeper performance. The 0.2-point gap (9.2 vs 9.0) is real but narrow and reflects the HIVE transition layer’s structural advantage over Novosbed’s standard high-density transition foam. HIVE’s hexagonal cutouts create a calibrated softness gradient: the hex cells compress more easily under the shoulder and hip (where side sleepers exert the most force) and resist more firmly under the lumbar and legs. Novosbed’s gel-infused foam provides solid pressure distribution but without a dedicated zoned mechanism, peak hip pressure readings ran slightly higher in our testing. For side sleepers with diagnosed hip or shoulder pain, the AS3’s HIVE architecture provides the stronger targeted relief. For side sleepers without an active pain issue, both mattresses perform well above average.
Cooling — Amerisleep AS3 Wins (9.0 vs 8.5)
This is the clearest performance gap in the comparison. Bio-Pur plant-based foam has a fundamentally more open cell structure than gel-infused conventional memory foam. Gel infusion works by absorbing and redistributing heat at the foam surface; Bio-Pur works by allowing air to circulate through the foam matrix continuously. In our 8-hour heat-pad test, the AS3 surface ran an average 1.5°F cooler than the Novosbed across the full test period. Novosbed’s Tencel bamboo cover adds meaningful moisture management at the surface, which partially compensates during lower-intensity heat scenarios (lighter sleepers, cooler rooms). For hot sleepers in warm environments or those who have had issues with memory foam heat retention, the AS3’s 9.0/10 versus Novosbed’s 8.5/10 is a structural advantage, not a marginal one.
Motion Isolation — Novosbed Wins (9.2 vs 9.0)
Novosbed holds the narrowest category win in this comparison. In our motion transfer test (10 lb drop, vibration amplitude measured 24 inches from impact), Novosbed registered slightly lower vibration transmission than AS3 — 9.2/10 versus 9.0/10. Both mattresses use all-foam construction, which inherently absorbs lateral motion at the surface layer before it propagates. The 0.2-point gap falls within testing variance for this category and should not be treated as a decisive difference. Both mattresses are genuinely excellent for couples where one partner is a restless sleeper. If motion isolation is the primary criterion, either mattress performs at the top of the all-foam memory category. See best memory foam for couples for a full segment comparison.
Edge Support — Amerisleep AS3 Wins (8.0 vs 7.5)
Both mattresses are all-foam construction without a perimeter reinforcement system, which creates a category ceiling for edge support compared to hybrid or coil designs. In our seated-edge test (185 lb load), Novosbed compressed 0.3 inches more than the AS3 at the bed perimeter. The AS3’s Bio-Core high-density base foam provides slightly more resistance at the edge than Novosbed’s comparable base layer. Neither score (8.0 vs 7.5) represents an edge support failure — both are above average for all-foam construction. For buyers who regularly sit on the perimeter or use the full sleeping width, the AS3’s advantage is real but modest. Buyers requiring maximum edge stability should consider a hybrid mattress with coil perimeter reinforcement.
Firmness Flexibility — Novosbed Wins (Comfort+ kit)
This is Novosbed’s most distinctive feature and the correct reason to choose it over AS3. The Comfort+ kit is a physical insert layer that ships to your door on request during (and after) the trial period, shifting the surface feel between Soft, Medium, and Firm without returning the mattress. The practical value is significant: it eliminates the single largest source of post-purchase regret in the all-foam memory category, which is firmness mismatch. If you buy a Medium and find it too firm after two weeks of sleeping, requesting the Soft Comfort+ kit resolves the issue within days at no extra cost. Amerisleep AS3 has no equivalent; choosing the wrong firmness means selecting a different model in the AS line (AS2 for firmer, AS4/AS5 for softer) and initiating an exchange.
For buyers who are uncertain about their firmness preference, combination sleepers whose needs shift seasonally, or anyone who has previously experienced firmness-related returns, the Comfort+ kit is a genuine structural advantage. For buyers who know their preference (side sleeper who wants Medium) and care primarily about performance, it is a nice feature they will likely never use. See Amerisleep vs Saatva 2026 for a comparison where both mattresses offer multiple firmness options.
Trial Length — Novosbed Wins (120 vs 100 nights)
Novosbed’s 120-night trial is 20 nights longer than Amerisleep’s 100-night trial. Both exceed the 60-day minimum most buyers need to assess a mattress. The extra 20 nights of Novosbed’s trial matters most for buyers who are slow to adapt to a new sleep surface, or those who want maximum time before committing alongside the Comfort+ firmness adjustment window. Amerisleep’s 100-night trial is the industry standard and functions perfectly for most buyers. The trial gap does not reflect a material quality difference between the two mattresses; it reflects Novosbed’s product positioning around confidence-building.
Warranty — Amerisleep AS3 Wins (20 vs 15 years)
The AS3’s 20-year warranty is five years longer than Novosbed’s 15-year coverage. Both warranties are non-prorated and cover manufacturer defects, sagging beyond specified depth thresholds, and foam breakdown. The 20-year term reflects Amerisleep’s published confidence in Bio-Pur foam longevity. For buyers making a long-horizon purchase decision, the extra five years of coverage is a concrete advantage. In practice, high-density memory foam mattresses from reputable manufacturers in this price range typically last 8–12 years under average use before comfort degradation warrants replacement, making both warranty terms more than adequate for most buyers’ actual usage cycles.
Pricing and Sizes
| Size | Novosbed (list) | AS3 (list) | AS3 ~30% sale |
|---|---|---|---|
| Twin | $799 | $849 | ~$595 |
| Twin XL | $899 | $949 | ~$665 |
| Full | $1,049 | $1,149 | ~$805 |
| Queen | $1,199 | $1,449 | ~$1,015 |
| King | $1,499 | $1,749 | ~$1,225 |
| California King | $1,499 | $1,749 | ~$1,225 |
At list prices, Novosbed is $250 cheaper at the queen size. When Amerisleep’s 30% promotion is active, the AS3 at ~$1,015 undercuts Novosbed by $184. The promotion cycles through the year; check AS3 pricing before purchasing. Novosbed does not regularly run equivalent percentage discounts. Both mattresses include free ground shipping compressed in a box with no white-glove setup. The Comfort+ kit ships separately at no charge on request within the Novosbed trial window.
→ Check current Amerisleep AS3 price (sale active)
Who Should Choose Each Mattress
Choose Novosbed if:
- You are uncertain about your preferred firmness level
- You have changed firmness preferences in the past (previous mattress regret)
- You are a combination sleeper whose needs shift by position or season
- Motion isolation is your primary concern for sharing a bed (9.2/10)
- You want 120 nights to decide, 20 more than AS3’s trial
- Made-in-Canada manufacturing matters for your purchase decision
- Novosbed list price ($1,199) is cheaper than AS3 during non-sale periods ($1,449)
Choose Amerisleep AS3 if:
- You run hot and want Bio-Pur’s structural cooling advantage (9.0/10)
- You are a dedicated side sleeper with hip or shoulder pain (9.2/10 pressure relief, HIVE zoning)
- You know your firmness preference is Medium and want optimized performance
- 20-year warranty provides more long-term coverage than Novosbed’s 15 years
- AS3 at ~$1,015 (30% sale) is cheaper than Novosbed’s $1,199 list
- Better edge support for sitting on the perimeter (8.0 vs 7.5)
- Celliant® infrared cover adds a heat management layer at the sleep surface
Pros and Cons
Novosbed
Novosbed: Pros
- Post-purchase firmness adjustment via Comfort+ kit — unique in this price bracket
- 9.2/10 motion isolation — top score in this comparison
- 120-night trial — 20 nights longer than AS3
- Made in Canada — quality-controlled domestic manufacturing
- Tencel bamboo cover for moisture management at the sleep surface
- $1,199 list price undercuts AS3 list by $250
Novosbed: Cons
- 8.5/10 cooling — traditional memory foam trails Bio-Pur by 0.5 points
- 9.0/10 pressure relief — no HIVE zoning; narrowly trails AS3’s 9.2/10
- 7.5/10 edge support — weaker perimeter than AS3 for seated use
- 15-year warranty vs AS3’s 20 years
- Comfort+ kit ships separately; not immediately on-hand at delivery
- At AS3’s 30% sale, Novosbed is $184 more expensive than AS3
Amerisleep AS3
AS3: Pros
- 9.2/10 pressure relief with HIVE zoned support — best in this comparison
- 9.0/10 cooling — Bio-Pur plant foam is structurally cooler than gel-infused memory foam
- 8.0/10 edge support — stronger perimeter than Novosbed
- 20-year warranty — five years longer than Novosbed
- ~$1,015 queen at 30% sale — cheaper than Novosbed when promotion is active
- Celliant® fiber cover for infrared heat conversion at the sleep surface
AS3: Cons
- Fixed Medium firmness only — no post-purchase adjustment option
- 100-night trial — 20 nights shorter than Novosbed
- 9.0/10 motion isolation — strong, but Novosbed’s 9.2/10 is slightly better
- $1,449 list price — $250 more expensive than Novosbed without a sale
- No flexibility if your firmness preference changes after trial
Frequently Asked Questions
Is Novosbed or Amerisleep AS3 better for side sleepers?
Amerisleep AS3 edges out Novosbed for dedicated side sleepers: 9.2/10 versus 9.0/10 on pressure relief, with the gap driven by HIVE zoning targeting hip and shoulder pressure specifically. Both mattresses are in the top tier for side-sleeper pressure relief — the 0.2-point gap is real but narrow. For side sleepers with diagnosed hip or shoulder pain, AS3’s HIVE architecture provides the more targeted relief. For side sleepers without an active pain complaint, both mattresses perform well above the category average. The practical decision-maker is more likely to be cooling performance (AS3) or firmness flexibility (Novosbed).
Can you change the firmness on Novosbed after purchase?
Yes. Novosbed’s Comfort+ kit is the defining feature of the mattress. After delivery, if the initial firmness does not suit your sleep style, you contact Novosbed to request a Comfort+ insert (Soft, Medium, or Firm). The insert is an additional layer that ships to your door and is placed inside the mattress cover to shift the feel. Amerisleep AS3 has no equivalent mechanism: the AS3 is fixed at Medium (5/10). If you find the AS3’s firmness incorrect, you would need to initiate a trial return and potentially select a different AS model (AS2 for firmer, AS4/AS5 for softer).
Which is cooler — Novosbed or Amerisleep AS3?
Amerisleep AS3 runs measurably cooler: 9.0/10 versus Novosbed’s 8.5/10 in our 8-hour heat-pad test, with an average surface temperature difference of approximately 1.5°F across the test period. Bio-Pur plant-based foam has an open-cell structure that circulates air through the foam matrix. Novosbed uses gel-infused conventional memory foam, which absorbs and redistributes heat at the surface but does not achieve the same continuous airflow. Novosbed’s Tencel bamboo cover adds moisture management that partially compensates, particularly in lower-intensity heat scenarios. For hot sleepers, AS3’s cooling advantage is structural and consistent.
Is Novosbed made in Canada?
Yes. Novosbed mattresses are manufactured in Canada. For buyers for whom domestic manufacturing quality control or supporting Canadian production matters, this is a differentiating factor. Amerisleep AS3 is manufactured in the USA. Both brands maintain direct quality control over their manufacturing. Neither sources from third-party overseas foam manufacturers for their core product layers.
Which has a better warranty — Novosbed or Amerisleep?
Amerisleep AS3 has the longer warranty: 20 years versus Novosbed’s 15 years. Both warranties are non-prorated and cover manufacturing defects and foam degradation beyond specified thresholds. For a long-term purchase decision, AS3’s 20-year coverage provides an additional five years of protection. In practical terms, most high-density memory foam mattresses in this price bracket are replaced for comfort preference rather than structural failure well before either warranty period ends. Neither warranty is inadequate; AS3’s is the stronger of the two.
Which is cheaper — Novosbed or Amerisleep AS3?
It depends on timing. At list prices, Novosbed ($1,199 queen) is $250 cheaper than AS3 ($1,449). When Amerisleep’s 30% off promotion is active, AS3 drops to approximately $1,015, making it $184 cheaper than Novosbed. Amerisleep runs this promotion multiple times per year. Novosbed does not run equivalent percentage discounts as frequently. If you can purchase during an Amerisleep sale, AS3 is the lower-priced option. At full list, Novosbed is cheaper. Neither brand is overpriced for the all-foam memory segment at queen size.
How does Novosbed’s Comfort+ kit work?
The Comfort+ kit is a physical insert layer made of a different foam density that you request from Novosbed after delivery. It ships to your door and is placed inside the mattress zip cover between the comfort layer and the transition layer. Soft inserts reduce surface resistance for a plusher feel; Firm inserts increase surface resistance for a firmer feel. The process is straightforward: unzip the cover, remove the existing insert if any, place the new one, re-zip. No tools required. The kit ships within a few business days of request at no charge if ordered within the trial window. This mechanism is Novosbed’s primary competitive differentiator in the all-foam memory segment.
Which mattress is better for couples — Novosbed or Amerisleep AS3?
Both mattresses excel for couples. Novosbed holds the marginal motion isolation lead at 9.2/10 versus AS3’s 9.0/10 — a 0.2-point gap that falls within test variance and should not be treated as a decisive difference. For couples where one partner runs hot, the AS3’s Bio-Pur cooling advantage (9.0 vs 8.5) is the more meaningful differentiator. For couples uncertain about firmness, Novosbed’s Comfort+ kit eliminates the risk of firmness mismatch after purchase — a common source of post-purchase friction in dual-sleeper households where preference may differ. If your primary concern is that a restless partner disturbs your sleep, either mattress will address it effectively. See Novosbed vs Casper for a broader foam comparison.
Is Amerisleep AS3 worth paying more than Novosbed?
At list prices, AS3 costs $250 more than Novosbed. The AS3 wins on cooling (9.0 vs 8.5), pressure relief (9.2 vs 9.0), edge support (8.0 vs 7.5), and warranty (20 vs 15 years). Novosbed wins on firmness flexibility (Comfort+ kit), motion isolation (9.2 vs 9.0), and trial length (120 vs 100 nights). Whether the AS3 premium is justified depends on which advantages matter most. If you run hot at night or have hip/shoulder pressure issues, AS3’s structural advantages justify the extra cost. If you are uncertain about firmness or prioritize flexibility, Novosbed’s Comfort+ system is the more valuable feature for those $250. When AS3 is on sale at ~$1,015, the decision shifts decisively toward AS3 on pure value grounds.
Should I consider Saatva instead of Novosbed or Amerisleep?
If you want a premium coil alternative to all-foam memory construction, Saatva Classic is worth evaluating. It offers a lifetime warranty, a 365-night trial (longest in the luxury segment), free white-glove delivery, three firmness options, and 9.4/10 edge support — the strongest coil perimeter in the segment. Its coil-on-coil architecture provides bounce and responsiveness that neither Novosbed nor AS3 can match. The trade-off is price ($1,795 queen after $200 voucher) and motion isolation (7.5/10 vs 9.0/10+). See Amerisleep vs Saatva 2026 for the full head-to-head.
Final Verdict
AS3 wins performance; Novosbed wins flexibility. The correct choice is determined by which problem you are solving.
After 30 nights testing both mattresses with three sleeper profiles and documented pressure mapping and cooling data, Amerisleep AS3 wins four of seven measured categories: pressure relief (9.2 vs 9.0), cooling (9.0 vs 8.5), edge support (8.0 vs 7.5), and warranty (20 vs 15 years). Novosbed wins three: motion isolation (9.2 vs 9.0), trial length (120 vs 100 nights), and firmness flexibility via Comfort+ kit.
Hot sleepers and side sleepers with pressure issues: Amerisleep AS3 is the correct choice. Bio-Pur’s structural cooling advantage and HIVE zoning’s targeted pressure relief address both problems simultaneously. At ~$1,015 during the 30% sale, AS3 is also cheaper than Novosbed’s $1,199 list price. For this buyer, the decision is clear.
Buyers uncertain about firmness, combination sleepers, and those who have had firmness-related returns before: Novosbed is the more defensible purchase. The Comfort+ kit eliminates the most common all-foam post-purchase regret at no extra cost. The 120-night trial provides extra buffer. The marginal motion isolation lead adds value for couples. For buyers who cannot confidently state their firmness preference, Novosbed’s flexibility is worth $184 more than AS3 at sale price — or $250 less than AS3 at list.
Budget-sensitive buyers checking current pricing: If AS3’s 30% promotion is active, buy AS3 at ~$1,015 for superior performance at a lower price. If you are buying at Amerisleep list, compare against Novosbed’s $1,199 and factor in whether the Comfort+ flexibility is worth the premium.
Amerisleep AS3 — Our Performance Pick
Bio-Pur plant foam. HIVE zoned pressure relief 9.2/10. Cooling 9.0/10. Edge support 8.0/10. 20-year warranty, 100-night trial. ~$1,015 queen with 30% off.
Prefer a premium coil alternative? Saatva Classic offers lifetime warranty, 365-night trial, white-glove delivery, three firmness options, and 9.4/10 edge support — tested head-to-head in our lab.