Amerisleep AS3 vs GhostBed Signature: AS3 Wins on Cooling

Two medium-feel memory foam mattresses, two different cooling stories. The Amerisleep AS3 (all-foam version) pairs a plant-based Bio-Pur comfort layer with a zoned HIVE support core and a heat-drawing Refresh cover, while the GhostBed Signature Memory Foam layers gel memory foam under a Ghost Ice quilted cover and a zoned ProCore center third. Both aim at the same balanced, pressure-relieving feel. Skip these all-foam models if you want coils; consider the AS3 Hybrid or Saatva Classic instead. The differences show up in how each brand talks about temperature, how long you get to try the bed, and how long the warranty runs.

A strong alternative

Saatva Classican innerspring option if you want coil support instead of an all-foam build

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

Check today’s Saatva price →

Which mattress should you choose between the AS3 and the GhostBed Signature?

The Amerisleep AS3 all-foam is the stronger pick for sleepers who overheat at night, because Amerisleep builds its cooling case layer by layer: a Refresh cover that draws heat from the skin, an open-cell Bio-Pur comfort layer that lets warm air escape, and a claim that the surface stays on average 7 degrees cooler over an eight-hour night. The GhostBed Signature Memory Foam answers with its own cover-first approach, the Ghost Ice quilted cover described as delivering 2x cooling power, plus gel-infused memory foam that draws heat away from the body. If cooling claims are what you shop on, the AS3 stacks more of them. If you care about zoned lumbar support and a straightforward medium feel, both mattresses give you a version of it, the AS3 through HIVE technology and the GhostBed through ProCore in the center third.

Who is each mattress for?

Pick the Amerisleep AS3 all-foam if you sleep hot, you want a medium feel that suits every sleeping style, and you value a fiberglass-free, non-toxic construction. Amerisleep positions the AS3 as its balanced option for all sleeping styles, and the all-foam build keeps the mattress simple: foam only, no coils. It also suits shoppers who want a long warranty, since Amerisleep backs the AS3 with 20 years.

Pick the GhostBed Signature Memory Foam if you want zoned support under the hips and torso and you like the idea of a cover engineered for cooling from the first touch. GhostBed describes the ProCore layer as delivering 33% more support in the center third of the mattress, which is where the body’s heaviest parts rest. The brand also positions the Signature Foam as an option for all sleeper types, while noting that some side sleepers may prefer the Signature Hybrid instead.

Neither mattress is sold by Saatva. If your priority is a traditional innerspring build with a pillow top and a choice of three firmness levels, the Saatva Classic is covered further down as a strong alternative.

How do the two mattresses compare on paper?

The table below lines up what each brand states about its own product. Prices appear only where the brand publishes one for a specific size.

How do the two mattresses feel and support you?

Both mattresses are sold as medium, and both translate that medium into a contouring memory foam feel rather than a firm, on-top feel. The AS3 uses Amerisleep’s HIVE technology to deliver targeted support across the surface, which the brand describes as maximizing airflow alongside support. The GhostBed takes a more localized approach: its ProCore layer concentrates extra support in the center third, the zone under the hips and torso, while the gel memory foam above handles pressure relief at the shoulders and hips.

The practical difference is where the support is concentrated. The AS3 spreads zoned support across the comfort system and pairs it with an open-cell foam that responds quickly, since Amerisleep says Bio-Pur snaps back to its original shape in seconds and does not leave you sunk in. The GhostBed concentrates support in one band and lets the gel foam do the contouring above it. Sleepers who want an even, responsive surface may prefer the AS3 approach; sleepers who specifically want firmer support under the midsection may prefer the GhostBed approach.

One construction note worth keeping straight: this comparison covers the all-foam AS3 only. Amerisleep also sells an AS3 Hybrid that combines foam and coils, and that is a separate product with its own feel. The GhostBed Signature line likewise includes a Signature Hybrid for shoppers who want coils, which GhostBed suggests for some side sleepers.

Which mattress sleeps cooler?

The Amerisleep AS3 makes the more detailed cooling case. Its Refresh cover is built from a fiber that draws heat from the skin for a cool-to-the-touch feel, and Amerisleep states that the sleeping surface stays on average 7 degrees cooler over an eight-hour night. Below that, the Bio-Pur layer uses an open-cell design so more air circulates than in traditional foam, which the brand links to less sweating and less tossing and turning. The cover also supports what Amerisleep describes as improved circulation and daily performance through far infrared exposure.

The GhostBed Signature Memory Foam keeps its cooling claim concentrated in two places. The Ghost Ice quilted cover uses temperature-regulating fabric and cooling fiber, described as delivering 2x cooling power. The gel-infused memory foam underneath contours to the body while drawing heat away from it. That is a clear, two-part story, but it is shorter than the AS3’s three-part one.

Hot sleepers should weigh the AS3’s layered approach against the GhostBed’s cover-and-gel approach. Both brands make a cooling claim; only Amerisleep attaches a temperature figure to it.

What do trial, warranty and shipping look like?

The trial periods are nearly identical: Amerisleep offers a 100-night sleep trial with easy and free returns, and GhostBed offers 101 nights. On warranty, the gap is wider. Amerisleep states a 20-year warranty on the AS3. GhostBed’s warranty runs 10 to 25 years depending on the model, so the exact coverage for the Signature Memory Foam depends on which tier that model falls into.

On shipping, Amerisleep states free shipping and returns with free no-contact fast shipping. Both mattresses are made in the USA with domestic and imported materials.

How do the prices compare?

For the queen size, Amerisleep lists the AS3 all-foam at Queen: $1,149 and GhostBed lists the Signature Memory Foam at Queen: $1,199. The two sit close together, and the fifty-dollar gap is small enough that trial length, warranty length and cooling claims should carry more weight in the decision than the price difference. Amerisleep notes that prices change with promotions, so check the current figure before you buy.

Who should not pick each mattress?

Skip the AS3 all-foam if you want coils. The all-foam build is foam throughout, and if you are shopping for the bounce and airflow of an innerspring, you would be looking at the AS3 Hybrid as a separate product, or at a coil mattress from another brand entirely. It is also the wrong choice if you want a firm, on-top feel, since the AS3 is sold as medium.

Skip the GhostBed Signature Memory Foam if you want a long, clearly stated warranty term. GhostBed’s coverage runs 10 to 25 years depending on the model, and if a firm, clearly defined warranty length matters to you, Amerisleep’s stated 20 years is easier to plan around. It is also the wrong pick if you want a detailed temperature figure behind the cooling claim, since GhostBed states a relative cooling multiple rather than a degrees-over-night figure.

What is the Saatva alternative if you want coils instead?

Both mattresses in this comparison are foam builds, so if your instinct is to avoid foam entirely, the Saatva Classic is the alternative worth a look. It is an innerspring mattress with a 3-inch Euro pillow top, a dual-coil design made from triple-tempered recycled carbon steel, and Lumbar Zone technology for spinal alignment. You choose between three comfort levels: Plush Soft at 3 out of 10, Luxury Firm at 5 to 7 out of 10, and Firm at 8 out of 10. It comes with a 365-night home trial, free white-glove delivery that includes in-room setup and removal of your old mattress, and a lifetime warranty for as long as you own it.

You can read the full breakdown in our Saatva Classic review.

Verdict: the Amerisleep AS3 (all-foam) wins this face-to-face. It carries the more complete cooling story, with a stated temperature figure behind the claim, a 20-year warranty against a tiered 10 to 25 year one, and free shipping and returns stated on the page. The GhostBed Signature Memory Foam is the closer pick for sleepers who want firmer support concentrated under the midsection and a cover engineered for cooling from first touch, and its queen price sits within fifty dollars of the AS3. Shoppers who want coils rather than foam should look at the Saatva Classic instead.

World Sleep Almanac score: 7.9/10 for the Amerisleep AS3 (all-foam) in this comparison. The score is an editorial rating built from these criteria: price at queen size against the competing model, trial and return terms, warranty length, materials and construction, and publicly stated brand claims. The AS3 scores well on warranty (20 years stated), trial (100 nights with free returns) and a fiberglass-free construction, while the tiered warranty structure on the GhostBed side and the close queen pricing keep the margin narrow.

Frequently asked questions

Is the Amerisleep AS3 the same as the AS3 Hybrid?

No. The AS3 comes in two versions: an all-foam build and a separate AS3 Hybrid that combines foam and coils. This comparison covers the all-foam version only. The Hybrid is a distinct product with its own construction and feel, so check which one you are looking at before comparing prices or reading reviews.

Does the GhostBed Signature Memory Foam come with coils?

No, the Signature Memory Foam is a foam mattress built around a high-density foam core with gel memory foam. GhostBed does offer a separate Signature Hybrid in the same collection for sleepers who want coils, and the brand notes that some side sleepers may prefer that version.

How long can I try each mattress at home?

Amerisleep offers a 100-night sleep trial on the AS3, and GhostBed offers 101 nights on the Signature Memory Foam. The two trial windows differ by a single night, so this axis is unlikely to decide the purchase on its own.

Which mattress has the longer warranty?

The AS3 is covered by a stated 20-year warranty. GhostBed mattresses carry a limited warranty running 10 to 25 years depending on the model, so the exact term for the Signature Memory Foam depends on where that model sits in the range.

Do either of these mattresses sleep hot?

Both brands build cooling into the surface. The AS3 uses a Refresh cover plus open-cell Bio-Pur foam and states its surface stays on average 7 degrees cooler over an eight-hour night. The GhostBed uses a Ghost Ice quilted cover described as delivering 2x cooling power plus gel-infused memory foam that draws heat away from the body.

Reviewed by the World Sleep Almanac editorial team, updated October 2026.