Amerisleep AS3 vs Nectar Classic: Which Foam Mattress Wins?

The Amerisleep AS3 all-foam and the Nectar Classic are both medium-feel memory foam mattresses built around contouring pressure relief, and both ship with a trial rather than a showroom visit. The AS3 pairs plant-based Bio-Pur foam with HIVE targeted support and a Refresh cooling cover, while the Nectar Classic layers pressure-relieving memory foam under a cool-to-touch cover at a 12-inch profile. This face-to-face sets the two official pages against each other on feel, materials, temperature, value and policies so you can pick the one that matches how you sleep.

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Which mattress should you choose between the Amerisleep AS3 and the Nectar Classic?

You should choose the Amerisleep AS3 all-foam if cooling technology and a medium feel with targeted support are your priorities, and the Nectar Classic if you want a straightforward medium-firm memory foam mattress with a long trial and a published queen price of $699. Both are all-foam designs at a 12-inch profile, so the decision comes down to how much cooling engineering you want and how you value the trial and warranty terms.

Amerisleep positions the AS3 as its most popular mattress, balanced for all sleeping styles, with a 100-night trial and a 20-year warranty. Nectar leads with a 365-night home trial and a Forever Warranty, which changes the risk calculation for a first online purchase. Neither mattress is sold by Saatva, so the Saatva Classic appears on this page only as an alternative for sleepers who would rather have coils and a pillow top than an all-foam build.

What are the key specifications of the Amerisleep AS3 and the Nectar Classic?

The two mattresses share a 12-inch profile height and a foam construction, but they differ in feel language, cooling features, trial length and warranty terms. The table below lists only what each official page states.

The AS3 is also sold as an AS3 Hybrid with foam and coils, a separate model that this comparison does not cover. If you are weighing the all-foam AS3 against the Nectar Classic, keep the comparison on the all-foam version, since the hybrid changes the support feel entirely.

How do the Amerisleep AS3 and the Nectar Classic feel and support you?

The AS3 is described as a medium feel balanced for all sleeping styles, with HIVE technology delivering airflow and targeted support beneath the comfort layer. Bio-Pur memory foam is engineered to snap back to its original shape in seconds, which Amerisleep presents as a way to avoid the deep sinking sensation of traditional memory foam while still contouring. That combination reads as a medium mattress with responsive push-back rather than a slow, enveloping hug.

The Nectar Classic is described as medium-firm with responsive support, built to deliver restorative and uninterrupted sleep night after night. Its pressure-relieving memory foam works with a cool-to-touch cover, and the brand frames the mattress as contouring pressure relief rather than firm resistance. The medium-firm label suggests a slightly firmer starting point than the AS3’s medium feel, which matters for side sleepers who want give at the shoulders and hips versus back sleepers who want a flatter surface.

Neither official page publishes a firmness scale number, so the difference between “medium” and “medium-firm” is a matter of brand language rather than a measured gap. If you have slept on medium-firm hotel mattresses before, the Nectar Classic is the closer match on paper; if you prefer a feel that is explicitly balanced for every position, the AS3 states that directly.

Which mattress sleeps cooler?

Cooling is the clearest axis of difference between these two pages. Amerisleep builds cooling into three places: the Refresh cover, the plant-based Bio-Pur open-cell foam, and the HIVE layer’s airflow channels. The brand states that the Refresh cover draws heat from the skin for a cool-to-the-touch feel and that the sleeping surface stays on average 7 degrees cooler over an eight-hour night, citing its own product claim. Bio-Pur’s open-cell design is described as more breathable than traditional foam, letting warm air escape instead of trapping it.

Nectar’s cooling story on the Classic page is more contained: a cool-to-touch cover comes standard, and NectarCool Technology is offered as a $99 add-on for sleepers who want more. The page also positions the Premier tier above the Classic with 60 percent more cooling, which tells you the Classic is the entry point of the cooling range rather than the peak. If temperature regulation is your main complaint, the AS3’s standard cooling stack is the more complete answer on paper, while the Nectar Classic gives you a cool cover at the base price and a paid path to more.

What materials does each mattress use?

The AS3 all-foam build centers on plant-based Bio-Pur memory foam, which Amerisleep describes as an eco-friendly alternative containing a fraction of the petrochemicals used in other memory foams, with less likelihood of off-gassing and no harmful substances. The mattress is fiberglass-free and non-toxic, and HIVE technology provides targeted support with enhanced airflow. The Refresh cover uses a fiber with high energy transfer to pull heat away, and Amerisleep notes the cover also supports circulation through far infrared exposure, referencing peer-reviewed medical studies.

The Nectar Classic uses pressure-relieving memory foam under a cool-to-touch cover, with the 12-inch profile giving the foam stack room to work. The page does not detail individual layers or name proprietary foams beyond the NectarCool add-on, so the material story is simpler than the AS3’s. Both mattresses are all-foam, which means neither uses coils in the versions compared here.

What do trial, warranty and shipping look like?

Amerisleep offers a 100-night sleep trial, a 20-year warranty, free shipping and returns, and mattresses made in the USA. Nectar offers a 365-Night Home Trial, a Forever Warranty, and free shipping and returns, with in-stock orders shipping in 1 to 2 days. The trial gap is the largest policy difference: 365 nights gives you a full year of seasons to decide, while 100 nights is a standard three-month window.

Warranty terms run in opposite directions as well. Amerisleep’s 20-year warranty is a fixed term, while Nectar’s Forever Warranty has no stated end date on the page. If long-term coverage matters more to you than the length of the trial, Nectar’s terms read stronger on both counts. If you want to confirm current delivery timing for your address, both brands list free shipping and returns, and you can check the details at checkout.

How do the prices compare?

The Amerisleep AS3 all-foam in queen size is listed at $1,149 with a list price of $1,749, and Amerisleep notes that prices change with promotions. The Nectar Classic in queen size is listed at $699. Both figures are the queen-size prices stated on each brand’s official page, so the comparison is size for size.

The AS3 carries a higher queen price, and its page frames that cost against a denser cooling and support feature set. The Nectar Classic undercuts it substantially at the same size, which matters if your budget is the deciding factor. Neither page publishes prices for other sizes, so twin, full, king and cal king figures are not part of this comparison.

Who should buy the Amerisleep AS3, and who should buy the Nectar Classic?

Buy the Amerisleep AS3 all-foam if you sleep hot and want cooling built into the cover, the comfort foam and the support layer rather than added as an upgrade. The Refresh cover, Bio-Pur open-cell foam and HIVE airflow are all standard on the AS3, and the medium feel is positioned for all sleeping styles. You are also buying a mattress Amerisleep calls its most popular, fiberglass-free and non-toxic, with a 20-year warranty behind it. The queen price of $1,149 reflects that feature stack, so it fits a shopper who has budgeted for a mid-tier foam mattress and wants the cooling engineering included.

Buy the Nectar Classic if your priority is a long trial, a long warranty and a lower entry price at the same queen size. The 365-Night Home Trial and Forever Warranty give you more time and more coverage than the AS3’s 100-night trial and 20-year warranty, and the $699 queen price is the more accessible of the two. The medium-firm feel and cool-to-touch cover cover the basics well, and the $99 NectarCool add-on gives you a paid path to more cooling if the standard cover is not enough. This is the pick for a value-minded shopper who wants a straightforward memory foam mattress without paying for a multi-layer cooling system.

Pick the Saatva Classic instead if neither foam mattress appeals and you want an innerspring build with a Euro pillow top, three comfort levels and two heights. Saatva is not the winner of this face-to-face, but it is the alternative for sleepers who know they want coils, a 365-night trial and white-glove delivery with old mattress removal.

World Sleep Almanac score: 6.0/10

The World Sleep Almanac editorial score for this comparison is 6.0/10, calculated from five criteria: price at equal size, trial and returns, warranty, materials and construction, and public review standing. The score reflects the combined profile of the two mattresses on this page rather than a single product.

• Price at equal size: the Nectar Classic queen at $699 is the stronger figure, while the AS3 queen at $1,149 sits higher, so this criterion is mixed.
• Trial and returns: Nectar’s 365-night trial and free shipping and returns outperform Amerisleep’s 100-night trial, pulling this criterion up.
• Warranty: Nectar’s Forever Warranty is open-ended while Amerisleep’s is 20 years, another point in Nectar’s favor.
• Materials and construction: the AS3’s named foam technologies, fiberglass-free build and cooling stack are the more detailed construction story, lifting this criterion.
• Public review standing: Amerisleep’s page cites 15,000 plus reviews averaging 4.7 stars and a Newsweek Readers’ Choice Best Mattress 2026 award for the AS3, while the Nectar page does not publish a review average, so this criterion is uneven.

The score is an editorial rating based on these stated criteria, not a lab test or a sleep trial conducted by the Almanac.

Frequently asked questions

Is the Amerisleep AS3 a foam mattress or a hybrid?

The AS3 is sold in two versions: an all-foam model and a separate AS3 Hybrid that combines foam and coils. This comparison covers the all-foam version only, since the hybrid is a different product with a different support feel.

Does the Nectar Classic come with cooling built in?

The Nectar Classic includes a cool-to-touch cover as standard. NectarCool Technology is available as a $99 add-on for sleepers who want additional cooling beyond the cover.

Which mattress has the longer trial period?

The Nectar Classic has a 365-Night Home Trial, while the Amerisleep AS3 has a 100-night sleep trial. Both brands list free shipping and returns.

Can I buy either mattress in stores?

Both official pages are set up for online purchase with free shipping and returns. Check each brand’s site for current availability in your area.

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