by Amerisleep AS3 vs Allswell (2026): Side-by-Side Comparison
One is a medium-feel all-foam mattress with a 100-night trial and a 20-year warranty. The other is a hybrid sold through a retailer with terms you need to confirm before buying.
The Amerisleep AS3 is the safer buy here. You get a medium-feel all-foam mattress with a 100-night trial, a 20-year warranty, and free shipping and returns, all published up front by the maker. Allswell sells mattresses through its own site and retail partners, and the trial length, warranty, and return process can differ depending on where you buy. If you want clear terms from the brand that builds the mattress, choose the AS3. If you go with Allswell, confirm the trial, warranty, and return policy with the retailer before you order.
Amerisleep AS3
A medium-feel all-foam bed that Amerisleep builds to balance support and softness for every sleep position.
Saatva Classic
- 365-night home trial gives you a full year to decide
- Lifetime warranty on manufacturing defects
- Free white-glove delivery with old mattress removal
- Three comfort levels (Plush Soft, Luxury Firm, Firm) and two heights
- Innerspring build, so motion isolation is not as strong as an all-foam bed
- White-glove delivery takes longer than a bed-in-a-box shipment
- Fewer firmness choices than a fully customizable bed
The Saatva Classic is the runner-up because it pairs a long trial and a lifetime warranty with in-hand delivery and mattress removal. It is a strong alternative if you want a traditional innerspring feel rather than foam, and its published terms are easy to verify before you buy.
Amerisleep AS3 vs Allswell: key specs
| Spec | Amerisleep AS3 | Allswell |
|---|---|---|
| Construction | All-foam (Bio-Pur) | Hybrid, shipped as a bed in a box (Luxe 12-inch, Supreme 14-inch) |
| Feel | Medium | Luxe hybrid in Medium or Extra Firm |
| Trial | 100 nights | – |
| Warranty | 20 years | – |
| Shipping | Free shipping and returns | – |
| Returns | Free returns within trial | – |
| Sold by | Amerisleep (brand site) | Allswell and retail partners |
Construction and materials
The Amerisleep AS3 is an all-foam mattress built around Bio-Pur, a plant-based foam. Amerisleep describes the AS3 as a medium-feel bed designed to balance support and softness for every sleep position, which makes it a straightforward pick for combination sleepers who shift during the night.
Allswell sells several mattresses, including The Allswell, The Luxe, The Brick, and The Supreme. The Allswell line is described as a hybrid mattress, which means it combines foam comfort layers with a coil support core. Hybrid builds typically give you more bounce and a stronger edge than an all-foam bed, but they can transfer more motion when a partner moves.
The exact layer materials, foam densities, and coil counts for Allswell mattresses are published on the product pages at allswellhome.com. Check those pages, or ask the retailer you are ordering from, for the current construction details before you buy.
Feel and firmness
The AS3 has a medium feel, which sits in the middle of the firmness range. Medium feels tend to work for the widest group of sleepers because they cushion the shoulders and hips without letting the midsection sink too far.
Allswell lists its Luxe 12-inch hybrid in a Medium and an Extra Firm version, plus a taller Supreme 14-inch hybrid, all shipped as a bed in a box. If you want something firmer than the AS3's medium, the Luxe Extra Firm is the Allswell model to look at.
Pressure relief
Pressure relief is about how well a mattress cushions your shoulders, hips, and lower back so you do not wake up sore. The AS3's Bio-Pur foam is built to give that cushioning while still supporting the midsection, which is what side sleepers and combination sleepers usually need most. Because it is a medium feel, it should not push back too hard at the shoulder while you are on your side.
Allswell's hybrid models layer foam over coils, which can also relieve pressure at the contact points. The difference comes down to the specific model and the firmness you choose. If pressure relief at the hips and shoulders is your main concern, compare the Allswell model you are considering against the AS3's medium feel before you order.
Cooling
Foam mattresses can trap heat if the foam is dense and closed off. The AS3 is an all-foam bed built with plant-based Bio-Pur foam.
Allswell's hybrid construction may have an airflow advantage because the coil layer lets air move through the mattress. Allswell also sells cooling accessories, including a Cool Lux cooling pillow and a graphite memory foam topper. Whether the specific Allswell mattress sleeps cooler than the AS3 depends on the model and your body, so check the product page for any cooling features the model includes.
Motion isolation
Motion isolation matters if you share a bed. All-foam mattresses like the AS3 generally absorb movement well, so a partner's tossing and turning is less likely to wake you.
Hybrid mattresses like Allswell's may transfer more motion than all-foam beds because the coils can bounce. If you are a light sleeper and your partner moves at night, that is a real trade-off to weigh.
Trial period and warranty
The Amerisleep AS3 comes with a 100-night trial and a 20-year warranty, both set by Amerisleep itself. Shipping and returns are free, so if the mattress is not right for you inside the trial window, you can send it back without a shipping charge.
Allswell's trial and warranty terms are not uniform across every channel. The mattress may be sold on allswellhome.com and through retail partners, and the trial length, warranty coverage, and return process can differ depending on where you order. Before you buy, ask the retailer three questions: How many nights is the trial? What does the warranty cover and for how long? What is the return process, and who pays return shipping? Get the answers in writing on the order confirmation.
Price and value
We do not publish prices on this page because they change often and vary by retailer. What matters more than the sticker price is what you get for it. The AS3 includes a 100-night trial, a 20-year warranty, and free shipping and returns as standard. Allswell's included terms depend on the seller, so factor the trial and warranty into the value comparison, not just the mattress cost. A lower price with a short trial and no clear warranty can cost you more if the mattress does not work out.
Who should buy each mattress
Buy the Amerisleep AS3 if: you want a medium-feel all-foam mattress with terms published by the company that builds it. It works for side, back, and combination sleepers who want balanced support and softness, and the free shipping and returns plus the 100-night trial and 20-year warranty make it a low-friction purchase. It is the better choice if you want to know exactly what you are getting before you order.
Buy Allswell if: you prefer a hybrid build with coils, you are buying through a specific retailer whose trial and warranty terms you have already confirmed, or you want to shop a lineup that includes several models (The Allswell, The Luxe, The Brick, The Supreme) so you can match firmness to your sleep position. Just be sure to verify the trial length, warranty, and return process with that retailer before you check out.
The Amerisleep AS3 is the pick for most buyers: a medium-feel all-foam mattress with a 100-night trial, a 20-year warranty, and free shipping and returns, all from the brand that makes it. Allswell is a legitimate option with several models to choose from, but its trial, warranty, and return terms depend on the retailer. Confirm those three things in writing before you order, and if the terms do not match what Amerisleep publishes, the AS3 is the clearer buy.
Frequently asked questions
Is Amerisleep AS3 or Allswell better for side sleepers?
The AS3's medium feel is designed to cushion the shoulders and hips while supporting the midsection, which suits most side sleepers. Allswell's models can also relieve pressure, but the right firmness depends on which model you pick. Compare the firmness of the specific Allswell mattress against the AS3's medium feel, and check the retailer's trial policy so you can switch if it is too firm or too soft.
Which mattress sleeps cooler, AS3 or Allswell?
The AS3 is an all-foam bed with plant-based Bio-Pur foam. Allswell's hybrid build has coils that let air move through the mattress, which can also help with temperature. The real answer depends on the specific Allswell model and your own body, so check the product page for cooling features and confirm the trial policy so you can test it at home.
How do the trials compare?
The AS3 comes with a 100-night trial set by Amerisleep, with free shipping and returns. Allswell's trial length depends on where you buy, since the mattress is sold through its own site and retail partners. Ask the retailer for the exact number of nights and the return process before you order.
What warranty does each mattress carry?
The AS3 carries a 20-year warranty from Amerisleep. Allswell's warranty terms depend on the seller. Ask the retailer what the warranty covers, how long it lasts, and whether it is handled by Allswell or by the retailer itself.
Can I get both mattresses on trial?
You can get the AS3 on its 100-night trial directly from Amerisleep, with free returns. Whether you can get an Allswell on trial depends on the retailer you buy from. Confirm the trial window and return policy with that retailer before you order, and keep the confirmation email.