Amerisleep AS3 vs Purple: AS3 Wins for Cooling, Purple for Value

Two of the most talked-about online mattresses land in the same medium-firm territory: the Amerisleep AS3 in its all-foam build, and the original Purple Mattress. Both aim at the same broad audience of combination sleepers who want balanced comfort, but they get there in very different ways. The AS3 leans on plant-based memory foam and a cooling cover, while Purple builds its feel around a 2-inch GelFlex Grid over comfort foam. This face-to-face breaks down feel, construction, cooling, trial terms and value so you can pick the one that matches how you actually sleep.

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• 365-night home trial
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• Three comfort levels: Plush Soft, Luxury Firm and Firm

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Which mattress should you choose between the Amerisleep AS3 and the Purple Mattress?

The short answer: pick the Amerisleep AS3 if you sleep hot and want a classic memory foam feel with a cooling cover, and pick the Purple Mattress if you want a responsive, pressure-relieving surface that stays cool through airflow rather than foam technology. Both are medium-firm, both suit stomach, back, side and combination sleepers, and both come with a 100-night trial. The differences sit in construction, materials and warranty length, and those are the axes we walk through below.

How do the AS3 and Purple feel under you?

Feel is where these two diverge most clearly. The Amerisleep AS3 is rated a medium feel and is built around Bio-Pur, a plant-based memory foam with an open-cell design. Amerisleep describes that foam as snapping back to its original shape in seconds, so you get contouring comfort without the deep, slow sink of traditional memory foam. The AS3 is positioned as balanced comfort and support for all sleeping styles.

The Purple Mattress is described as medium-firm with responsive support that eases pains at the hips, shoulders and joints. Its signature is the 2-inch GelFlex Grid made of Hyper-Elastic Polymer, which sits above a 3.5-inch comfort foam layer and a 4-inch base foam. Purple states the mattress is best for stomach, back, side and combination sleepers, and that the grid dissipates heat while relieving pressure. If you prefer a foam that hugs you, the AS3 is the natural fit; if you want a surface that adapts instantly and pushes back, Purple is the one.

What is each mattress actually made of?

The construction comparison is straightforward once you line up the layers. Here is how the two builds stack up side by side.

Two construction notes stand out. First, the AS3’s HIVE technology is described by Amerisleep as maximizing airflow and delivering targeted support, which is how the foam build handles pressure distribution. Second, Purple’s grid layer is the entire difference in feel: the GelFlex Grid is what makes the mattress instantly adaptive, while the foam layers beneath stabilize and support it. Neither mattress uses coils in these versions, so both are pure foam builds in this comparison.

Which one sleeps cooler for hot sleepers?

Both brands put cooling front and center, but they use different mechanisms. Amerisleep’s approach is layered: the Refresh Cover is made from a fiber with high energy transfer that draws heat from your skin, and Amerisleep states the sleeping surface stays on average 7 degrees cooler over an eight-hour night. Under that, the Bio-Pur open-cell design lets more air circulate than traditional foam, which Amerisleep links to less sweating and less tossing and turning.

Purple’s cooling claim rests on the GelFlex Grid itself, which the brand says dissipates heat while relieving pressure. The grid structure leaves open space for air to move, and the breathable stretch top panel flexes with it. Purple also cites a 2025 SleepScore Labs study of its Essential Collection mattresses, reporting 88% of subjects felt satisfied with their sleep and a 60% increase in reported ease of falling asleep. If you want a cover engineered to pull heat away, the AS3 has the more specific cooling story; if you want airflow through an open grid structure, Purple delivers that.

How do trial, warranty and shipping compare?

Both mattresses come with a 100-night trial, so the risk window is identical. The divergence is in warranty length: Amerisleep backs the AS3 with a 20-year warranty, while Purple’s original mattress carries a 10-year warranty. On shipping, Amerisleep offers free shipping and returns with no-contact fast delivery, and the mattress is made in the USA. Purple ships from its US warehouse in a rolled design with handles, described as ready to rest with no wait time. Purple also runs a lowest price guarantee, matching if you find it lower elsewhere.

For a shopper weighing long-term ownership, the warranty gap is the clearest structural difference between these two policies. Twenty years of coverage versus ten is a real distinction when you are deciding which foam build you expect to keep longer.

Who should buy the Amerisleep AS3, and who should buy the Purple Mattress?

Buy the Amerisleep AS3 if you are a hot sleeper who wants a medium-feel memory foam mattress with a cooling cover, contouring comfort that does not trap you, and a longer 20-year warranty. It suits combination sleepers who want balanced comfort across positions, shoppers who prefer a fiberglass-free and non-toxic build, and anyone who likes the idea of plant-based foam over traditional petrochemical memory foam. The AS3 is also Amerisleep’s most popular mattress and was voted Newsweek Readers’ Choice Best Mattress of 2026, with the brand reporting 15,000-plus reviews averaging 4.7 stars.

Buy the Purple Mattress if you want a responsive, medium-firm surface that eases pressure at hips, shoulders and joints without the slow sink of memory foam. It suits stomach, back, side and combination sleepers who change positions at night and want a surface that adapts instantly. Purple’s grid construction is the pick for anyone who has found traditional foam too warm or too contouring, and the rolled delivery with handles makes setup simple in tight spaces. Purple’s product page carries a 4.5 rating across 29,585 reviews, and the brand notes over 22,000 five-star reviews on the mattress.

Both are legitimate choices for the same sleeper profile. The decision comes down to feel preference and how much warranty length matters to you.

What does each mattress cost?

On price, only one of the two publishes a figure in the sources reviewed here. The Amerisleep AS3 in all-foam, Queen: $1,149, with a list price of $1,749. The AS3 Hybrid in Queen is listed at $1,349 if you prefer coils over pure foam. Prices change with promotions, so check the current figure before you buy. The Purple Mattress price is not published here, so no value conclusion can be drawn between the two on price alone. What you can compare directly is what each brand includes: both offer a 100-night trial and free shipping, while the AS3 carries a 20-year warranty against Purple’s 10-year.

Which mattress should you not buy?

Skip the Amerisleep AS3 if you dislike any contouring at all. Its Bio-Pur foam is designed to hug the body, and even with the fast recovery time, it is still a memory foam feel. If you want a surface you rest on top of rather than in, Purple’s grid is the better match. Also pass on the AS3 if a 100-night trial feels too short for your decision style; neither mattress extends beyond that window.

Skip the Purple Mattress if you want the slow, cradling sink of traditional memory foam. The GelFlex Grid is responsive and pushes back, which is the opposite of that feel. It may also be the wrong call if warranty length is a priority for you, since Purple’s coverage runs 10 years against Amerisleep’s 20. And if you need a taller profile, the Purple’s 9.25-inch height is noticeably lower than the AS3’s 12-inch build.

Is the Saatva Classic a good alternative to either mattress?

If neither foam build appeals, the Saatva Classic is an innerspring alternative with a different feel entirely. It comes in 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, so you can match firmness to your sleep position rather than accepting one feel. Saatva pairs a 3-inch Euro pillow top with a dual-coil design of triple-tempered recycled carbon steel coils, and it includes patented Lumbar Zone technology for spinal alignment. The Classic carries a 365-night home trial, a lifetime warranty, and free white-glove delivery that includes in-room setup and removal of your old mattress at no additional cost. It is chiropractor endorsed and CertiPUR-US and GREENGUARD Gold certified. For shoppers who want a traditional innerspring feel with a much longer trial than either foam mattress offers, the Classic is worth a look.

A strong alternative

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

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World Sleep Almanac score: 7.5/10

The editorial score for this head-to-head comparison is 7.5 out of 10, judged on how clearly the two products can be compared from their published information and how strong each policy set is for the reader. The criteria and their weight in the score:

• Price transparency at equal size: the AS3 publishes a Queen figure of $1,149 against a $1,749 list price, while the Purple Mattress price is not published here, so one side of the comparison is incomplete on cost.
• Trial and returns: both mattresses carry a 100-night trial with free shipping, which is a solid but not extended window for a foam mattress decision.
• Warranty: the AS3’s 20-year warranty is double the Purple’s 10-year coverage, a clear advantage on one side.
• Materials and construction: both builds are fiberglass-free and clearly specified layer by layer, with the AS3’s cooling cover and Bio-Pur foam and Purple’s GelFlex Grid both well documented.
• Public review standing: the AS3 carries Amerisleep’s reported 15,000-plus reviews at 4.7 stars and a Newsweek Readers’ Choice award, while Purple shows a 4.5 rating across 29,585 reviews.

The score reflects this comparison as a whole, not either brand in isolation. The missing Purple price and the shorter trial window on both sides keep it from a higher mark, while the clear construction detail and the AS3’s longer warranty hold it up.

Frequently asked questions

Is the Amerisleep AS3 firmer than the Purple Mattress?

The AS3 is rated a medium feel, while the Purple Mattress is described as medium-firm with responsive support. In practice that means the Purple has a slightly more supportive, less contouring character, while the AS3 offers more body-hugging comfort. Both are designed to work across stomach, back, side and combination sleep positions.

Do both mattresses sleep cool?

Both brands build cooling into their designs, using different methods. Amerisleep combines a Refresh Cover that draws heat from the skin with open-cell Bio-Pur foam that allows more airflow than traditional memory foam, and states the surface stays on average 7 degrees cooler over an eight-hour night. Purple uses its GelFlex Grid to dissipate heat through its open structure, paired with a breathable stretch top panel. Which approach works better for you depends on whether you prefer a cooling cover or an airflow-first design.

How long can I try each mattress at home?

Both the Amerisleep AS3 and the Purple Mattress come with a 100-night trial, giving you the same window to decide. Amerisleep describes its trial as with easy and free returns, while Purple frames its 100-night trial as part of its worry-free guarantee alongside a lowest price guarantee.

Which mattress has the longer warranty?

The Amerisleep AS3 carries a 20-year warranty, which is twice the length of the Purple Mattress’s 10-year warranty. If long-term coverage matters in your decision, that gap is the clearest policy difference between the two.

Can I buy a coil version of the Amerisleep AS3?

Yes. Amerisleep offers the AS3 in both an all-foam build and an AS3 Hybrid that combines foam with coils. The all-foam version is the one compared here, and the AS3 Hybrid in Queen is listed at $1,349. The Purple Mattress compared in this face-to-head is the original all-foam model with the GelFlex Grid; Purple also sells hybrid versions in its broader lineup.

Verdict: the Amerisleep AS3 wins this face-to-face for hot sleepers who want a medium memory foam feel with a documented cooling cover and a 20-year warranty. The Purple Mattress is the pick for combination sleepers who want responsive pressure relief without foam sink, and its 4.5 rating across nearly 30,000 reviews shows how well that grid design lands with buyers. Both carry a 100-night trial, so the deciding factors are feel preference and warranty length. Shoppers who want a longer trial and a traditional innerspring build should look at the Saatva Classic as an alternative.

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