by Amerisleep Colonial is the old name of the Amerisleep AS4 mattress. It’s a classic memory foam mattress with a few innovative technologies.
The company has introduced Bio-Pur memory foam which features a larger open-cell structure making the mattress more breathable and comfortable for hot sleepers. It comes with HIVE technology that ensures targeted support and further maximizes airflow.
The mattress features durable base foam that prevents sagging and going out of shape in the long run. And the best part is that this mattress is free of any fiberglass and is non-toxic and eco-friendly.
Amerisleep AS3 — Best Replacement for the Colonial
The Amerisleep Colonial has been discontinued. The AS3 is the direct successor: same Bio-Pur foam, same HIVE 5-zone support, balanced medium feel that works for back, side, and combo sleepers. If your old Colonial was softer, look at the AS4 instead.
The Amerisleep Colonial is the old name for an Amerisleep all-foam mattress, and the line has since been rebranded. The current mattress to buy is the Amerisleep AS3, a balanced medium all-foam bed with the same Bio-Pur and HIVE technology that works for back, side, and combo sleepers. If your pain sits squarely at the shoulder or hip, the softer AS4 is the step-up option.
Amerisleep AS3
9.3/10
- The most versatile Amerisleep, balanced for back, side, and combo sleepers
- HIVE 5-zone support cushions shoulders and hips while holding the lumbar firm
- Partially plant-based Bio-Pur foam runs cooler than standard memory foam
- CertiPUR-US certified, made in the USA, free delivery
- 20-year split warranty with full replacement in years 1 to 10
- Strict side sleepers who want deep shoulder give may prefer the softer AS4
- Edge support is softer than a coil hybrid
- Hot sleepers who run very warm do better on a coil-based hybrid
The AS3 is the Amerisleep I send most people to when they ask about the old Colonial. The medium feel handles the widest range of sleeping positions and body types, and the HIVE zones keep the spine aligned without the lumbar-sag risk of a softer bed. It is also the lower-priced pick.
What is the Amerisleep Colonial mattress?
Amerisleep rebranded their lineup several years ago, and the Colonial name disappeared. The current Amerisleep all-foam range is built on the same two materials the Colonial used: the Bio-Pur comfort foam and the HIVE zoned support layer. So if you owned a Colonial and want to replace it, you are choosing within the modern AS series, not hunting for a discontinued model.
For most people coming off a Colonial, the AS3 is the right current equivalent. It is the balanced medium in the range and the best-seller. If your old mattress left you achy specifically at the shoulder or hip and you sleep mostly on your side, the softer AS4 is worth a look instead. Both use the same core technology, so the real decision is firmness.
Who the AS3 is actually for
I run buyers through a simple filter: how do you sleep, and where does it hurt? The AS3 is the answer for the broadest set of sleepers because medium handles back, side, and combo positions without committing to one extreme.
The AS3 fits you if:
- You switch positions through the night. The medium feel lets the shoulder settle when you roll to your side and still holds the lumbar when you roll to your back.
- You are a back sleeper who wants pressure relief without sag. The AS3 keeps the lumbar neutral better than the softer AS4.
- You want the safest single pick. When you are not sure, medium is the lowest-risk firmness for a household with mixed sleeping styles.
Step up to the AS4 only if you are a dedicated side sleeper whose shoulder hurts in the morning, since the AS4 adds a thicker comfort layer for deeper give at the contact point.
Construction and specs
The AS3 is a three-layer all-foam mattress at a 12-inch total height:
- Cover: stretch-knit fabric, breathable and removable for cleaning.
- Comfort layer (Bio-Pur): Amerisleep's partially plant-based open-cell foam. The open-cell structure prevents the heat-trapping that makes traditional memory foam run warm.
- Transition layer (HIVE): hexagonal cutout zones that vary firmness across five body regions. The shoulder and hip zones give while the lumbar and leg zones resist, which keeps the spine aligned across positions.
- Support core (Bio-Core): high-density base foam that prevents permanent body impressions and backs the 20-year durability claim.
CertiPUR-US certification covers the foams for content and emissions. Amerisleep uses a woven silica flame barrier rather than loose fiberglass, a meaningful distinction for anyone concerned about what is inside the mattress.
Performance in key areas
Pressure relief
The AS3 relieves pressure well for a medium mattress. The Bio-Pur layer lets the shoulder and hip settle, and the HIVE zones add give exactly where side sleepers need it. Strict side sleepers who want even deeper shoulder sinkage are the only group that should consider the softer AS4 instead.
Spinal alignment
This is where the medium feel earns its place. For back sleepers the AS3 holds the lumbar in neutral, and for side sleepers the HIVE zones keep the spine horizontal as the shoulder sinks. Combo sleepers get a feel that works in both positions without retuning.
Motion isolation
All-foam construction absorbs movement extremely well. Partner disturbance is minimal. If you share a bed with someone who shifts frequently, the AS3 is a strong performer here.
Cooling
Bio-Pur runs cooler than dense traditional memory foam, but the mattress is still all-foam. Most sleepers at a normal temperature sleep comfortably. If you wake overheated, the Amerisleep AS5 Hybrid with coil-based airflow is a better fit.
Edge support
Softer than a coil hybrid, which is expected for an all-foam bed. Sitting on the perimeter for a long time produces more compression than a reinforced coil edge. Not a deal-breaker for most, but worth noting if you use the full edge regularly.
Durability
The 20-year split warranty signals real confidence in the materials. Years 1 to 10 cover defects and sagging over 1.5 inches at no cost. Years 11 to 20 give you a replacement at 50% off the current price. For an all-foam mattress this is among the strongest coverage in the category.
Amerisleep AS3 vs AS4: which one to pick
| Mattress | Type | Firmness | Trial | Warranty | Queen price |
|---|---|---|---|---|---|
| Amerisleep AS3 | All-foam Bio-Pur | Medium 5/10 | 100 nights | 20 years | From $1,049 |
| Amerisleep AS4 | All-foam Bio-Pur | Medium-Soft 4/10 | 100 nights | 20 years | From $1,249 |
If you are not sure which one fits you, default to the AS3. It covers a wider range of sleeping positions and body types at a lower price. Step up to the AS4 only if you know your pain is at the shoulder or hip and previous medium mattresses have left you sore.
Amerisleep AS4
9.0/10
- Deeper comfort layer than the AS3, tuned for side and combo sleepers
- HIVE 5-zone support cushions shoulders and hips without bottoming out
- Same Bio-Pur foam and 100-night trial as the AS3
- 20-year split warranty, free shipping
- Too plush for strict stomach sleepers and most back sleepers over 200 lb
- Costs more than the AS3 for a narrower fit
The AS4 is the right Amerisleep for dedicated side sleepers. The thicker comfort layer takes the edge off shoulder and hip pressure that the firmer AS3 misses, and the HIVE zones keep the spine lined up even in a tucked fetal position.
Trial, warranty, and delivery
Both the AS3 and AS4 ship free via FedEx to the continental US, arrive compressed in a box, and expand within 24 to 48 hours. The 100-night trial is fully risk-free: Amerisleep will arrange pickup and refund the full amount if you are not satisfied. The 20-year split warranty covers manufacturing defects and body impressions deeper than 1.5 inches. Free repair or replacement in years 1 to 10, and 50% off a replacement in years 11 to 20.
Amerisleep also offers 0% APR financing through Klarna, available in 4-payment installments for smaller purchases and 6, 12, and 18-month plans for larger orders.
Frequently asked questions
Is the Amerisleep Colonial still sold?
No. Amerisleep retired the Colonial name when they rebranded the full lineup. The construction, materials, and feel live on in the current AS series. If you owned a Colonial and want to replace it, the AS3 is the closest current equivalent for most sleepers.
Which Amerisleep replaced the Colonial?
The modern AS range uses the same Bio-Pur and HIVE technology the Colonial used. The balanced medium AS3 is the right pick for most people, while side sleepers who want a softer feel should look at the AS4.
Is the AS3 good for back pain?
Yes for most cases. The medium feel holds the lumbar in neutral for back sleepers while still relieving pressure for side sleepers. If your pain is specifically at the shoulder or hip when you sleep on your side, the softer AS4 may suit you better.
How long does the Amerisleep AS3 last?
With regular rotation and proper base support, the AS3 holds up well for 8 to 12 years in typical use. The 20-year warranty covers premature sagging, which is the main durability failure mode for all-foam mattresses.
Does the AS3 sleep hot?
The Bio-Pur open-cell foam dissipates heat better than traditional dense memory foam. Most sleepers at normal body temperatures sleep comfortably. If you wake sweating regularly, a hybrid such as the AS5 Hybrid with coil-based airflow is a better fit.
The Amerisleep Colonial is a discontinued name, and the mattress to buy now is the AS3. It is the balanced medium that fits the widest range of sleepers and carries the lower price. Dedicated side sleepers who want a softer feel should step up to the AS4. Both share the same 100-night trial and 20-year warranty, so you can compare without risk.
Amerisleep AS3
9.3/10
Balanced medium feel, HIVE 5-zone pressure zoning, partially plant-based Bio-Pur foam, 100-night trial, and a 20-year warranty. The best replacement for the old Colonial for back, side, and combo sleepers alike.