Amerisleep AS5 Review 2026: Soft Plush Feel for Side Sleepers

The Amerisleep AS5 is the softest mattress in the Amerisleep lineup, built for sleepers who want a plush, contouring surface rather than a firm one. Skip it if you sleep on your stomach or need a firmer surface; consider the Saatva Classic’s firmness choices instead. Amerisleep positions it as an ultra-soft option that pairs memory foam with a responsive layer called Active Flex, aimed squarely at side sleepers, combination sleepers and heavier sleepers. It comes in two builds, an all-foam version and a hybrid version with coils, and both share the same 14-inch profile and soft feel. If you sink into a mattress and want it to cradle your hips and shoulders, the AS5 is the model Amerisleep designed for that job.

A strong alternative

If you want a Saatva instead: Saatva Classica luxury innerspring with three comfort levels

• 365-night home trial
• Free white-glove delivery and old-mattress removal
• Lifetime warranty
• Plush Soft, Luxury Firm and Firm comfort levels in one model

Check today’s Saatva price →

Who is the Amerisleep AS5 for?

The AS5 is for sleepers who want the softest feel Amerisleep offers. Amerisleep names three groups directly: side sleepers, combination sleepers and heavy sleepers. Amerisleep aims it at side sleepers who want a deep, plush top, at combination sleepers who want a responsive surface, and at heavier sleepers who want more give than a firm mattress offers. The ultra-soft construction is the whole point of this model, so it suits anyone who has found every other mattress too hard.

It is also a good fit for people who care about what their mattress is made of. The AS5 is fiberglass-free, non-toxic and made in the USA of U.S. and imported parts, and the foams are plant-based rather than fully petrochemical. If you are shopping for a plush bed-in-a-box with a cooling cover and a long trial period, this is the Amerisleep model to look at first.

What are the Amerisleep AS5 specs?

Here is the AS5 on paper. Both the all-foam and hybrid versions share the same feel, height and trial terms, so the choice between them comes down to whether you want coils under the foam.

How does the AS5 feel and support you?

The AS5 is soft, and everything in its construction works toward that single feel. The top layer is Bio-Pur, Amerisleep’s plant-based memory foam, which contours to the body. Under it sits Active Flex, a responsive foam layer, and beneath that a durable base foam designed to prevent sagging and uncomfortable sinkage. The result is a mattress you sink into at the surface while still being held up underneath.

Bio-Pur is the layer that separates this from traditional memory foam. Amerisleep describes it as open-cell, and says air moves through it more freely than through conventional foam; according to the brand it snaps back to its original shape in seconds rather than leaving a slow-recovering impression. The material also contains a fraction of the petrochemicals used in other memory foams, which Amerisleep says reduces off-gassing. For a soft mattress, that quick response matters: you get the cradling without feeling stuck.

The 14-inch profile gives the layers room to work, and the hybrid version adds coils beneath the foam stack for sleepers who want more bounce and airflow under the comfort layers.

Does the AS5 sleep cool?

Cooling is one of the AS5’s headline features, and Amerisleep backs it with a specific figure. The Refresh cover is made from a fiber with high energy transfer capabilities that Amerisleep says draws heat away from the skin, and Amerisleep states that the sleeping surface stays on average 7 degrees cooler over an eight-hour night. On top of that, the open-cell structure of Bio-Pur lets warm air escape rather than build up, which is the usual complaint about traditional memory foam.

So the cooling story has two parts: a cover that pulls heat away on contact and a comfort foam that breathes instead of trapping it. If you are a hot sleeper who has avoided memory foam for exactly that reason, the AS5’s combination of Refresh cover and Bio-Pur is the answer Amerisleep gives you.

What do you get with the AS5 purchase?

Every AS5 ships with the same terms regardless of build. You get a 100-night sleep trial (Amerisleep accepts returns only after the first 30 nights), free returns, free shipping with no-contact delivery, and a 20-year warranty. The mattress is made in the USA of U.S. and imported parts, and Amerisleep flags it as fiberglass-free and non-toxic on the product page.

Amerisleep also lists the AS5 as medical expert approved and endorsed by the American Chiropractic Association, with evaluation by board-certified doctors of chiropractic. The brand’s Canadian page shows a rating of 4.7 stars averaged across more than 15,000 reviews for its soft mattress line. Check the current price on the Amerisleep site for your size, since the AS5 is offered in both all-foam and hybrid versions at different price points.

Who should NOT buy the Amerisleep AS5?

The AS5 is Amerisleep’s softest mattress, and that is a reason to skip it for some sleepers. Stomach sleepers usually prefer a firmer surface, and a 14-inch ultra-soft build is the opposite of that. Back sleepers who prefer to lie on top of the mattress rather than sink into it will also find the AS5 too plush. If you have ever returned a mattress because it was too soft, this one will not change your mind.

It is also worth noting that the AS5 is the plush end of the Amerisleep range. Sleepers who want a balanced medium feel, or who share a bed with a partner who sleeps on their stomach, should look at a firmer model in the lineup instead. The Amerisleep AS3 review covers the brand’s medium option, which is the more common choice for couples with mixed sleep positions.

How does the AS5 compare to the Saatva Classic?

The Saatva Classic is a different kind of mattress: a luxury innerspring with a 3-inch Euro pillow top, a dual-coil design and three comfort levels rather than one. Where the AS5 commits to a single soft feel, the Saatva Classic lets you choose Plush Soft at 3 out of 10, Luxury Firm at 5 to 7 out of 10, or Firm at 8 out of 10. That makes it the better pick for couples who cannot agree on firmness, or for a sleeper who is not sure whether soft is really what they want.

The trial terms also differ. Saatva includes a 365-night home trial and a lifetime warranty, compared with 100 nights and 20 years for the AS5, and delivery includes in-room setup with your old mattress taken away at no extra cost. For a full breakdown of how the two brands stack up, see our Saatva vs Amerisleep comparison.

What does the World Sleep Almanac think?

World Sleep Almanac score: 7.6/10. The score is an editorial rating based on five criteria: price at equal size, trial and returns, warranty, materials and construction, and public customer reviews. The AS5 scores well on materials, with its fiberglass-free, plant-based foam construction and a cooling cover backed by a stated 7-degree figure,. The 100-night trial and 20-year warranty are solid but trail the longer terms offered elsewhere in the premium category, and the single soft feel limits who the mattress suits. The score reflects the product as a plush specialist rather than a universal pick.

Verdict: the Amerisleep AS5 is the right buy if you are a side sleeper, a combination sleeper or a heavier sleeper who has decided you want a genuinely soft mattress with a cooling cover and a fiberglass-free build. It gives you Amerisleep’s plushest feel, a 100-night trial to confirm the feel works for you, and a 20-year warranty behind it. Skip it if you sleep on your stomach, if you prefer to sleep on top of the mattress, or if you share a bed with someone who needs a firmer surface. In those cases, look at a firmer model in the Amerisleep range, or at the Saatva Classic, which gives you three comfort levels and a 365-night trial to find the right one.

A strong alternative

If you want a Saatva instead: Saatva Classicthree comfort levels, one model

• 365-night home trial
• Free white-glove delivery and old-mattress removal
• Lifetime warranty
• Plush Soft, Luxury Firm and Firm in a single innerspring

Check today’s Saatva price →

Frequently asked questions

Is the Amerisleep AS5 too soft for stomach sleepers?

The AS5 is Amerisleep’s softest model, built with a plush comfort layer. That deep give is ideal for side sleepers but works against stomach sleepers, who generally prefer a firmer surface. If you spend most of the night on your stomach, a firmer mattress in the Amerisleep range will serve you better than the ultra-soft AS5.

What is the difference between the AS5 All Foam and the AS5 Hybrid?

Both versions share the same soft feel, the same 14-inch profile, the same Bio-Pur comfort layer and Active Flex support, and the same Refresh cooling cover. The difference is what sits underneath: the all-foam build uses a durable base foam, while the hybrid build adds coils beneath the foam stack. Choose the hybrid if you want more airflow and bounce under the comfort layers, and the all-foam version if you prefer a pure foam feel with no coils.

Does the Refresh cover really keep the mattress cooler?

Amerisleep states that the Refresh cover, made from a fiber with high energy transfer capabilities, keeps the sleeping surface on average 7 degrees cooler over an eight-hour night. The cover works alongside the open-cell structure of Bio-Pur, which lets warm air escape instead of building up in the foam. Together, the two features address both the surface heat you feel when you first lie down and the heat that builds up over a full night.

Is the Amerisleep AS5 fiberglass-free?

Yes. Amerisleep lists the AS5 as fiberglass-free, eco-friendly and non-toxic on the product page. The comfort foam is also plant-based, using renewable plant oils rather than relying entirely on petrochemicals, which Amerisleep says reduces off-gassing compared with traditional memory foam.

How long can I try the Amerisleep AS5 at home?

The AS5 comes with a 100-night sleep trial; Amerisleep accepts a return only after the first 30 nights, and returns are free. That is long enough to move past the initial adjustment period and judge the soft feel for yourself, though it is shorter than the 365-night trial Saatva offers on its mattresses.

Reviewed by the World Sleep Almanac editorial team. Updated 2026.