Amerisleep vs Zinus Review: AS3 or Green Tea Mattress?

This is a focused comparison between the standard all-foam Amerisleep AS3 and the Zinus Original Green Tea Memory Foam Mattress. Amerisleep also sells a hybrid AS3, but that is not the version considered here.

Amerisleep vs Zinus at a glance

The first visible difference is height: Amerisleep lists the AS3 at 12 inches, while Zinus lists the Original Green Tea Memory Foam Mattress at 10 inches. Height alone does not decide comfort, but it does frame two noticeably different construction approaches.

Construction and feel: two foam designs with different priorities

Amerisleep builds the all-foam AS3 around Bio-Pur foam and its HIVE zoned support design. The brand calls the AS3 medium. That gives shoppers a direct feel description to start from, along with a named support feature rather than a generic foam stack.

Zinus describes its Original Green Tea model as a three-layer CertiPUR-US certified foam mattress, with green-tea-infused memory foam in the construction. It is a 10-inch all-foam design. That is a more stripped-back materials story, which will appeal to buyers who do not want to sort through a more elaborate support concept.

One detail needs a clean boundary: Zinus’s product page contains conflicting descriptions of the Green Tea memory-foam layer depth. I would not use a precise layer measurement to choose between these mattresses.

Neither brand provides foam-density figures in the details considered here. That matters for anyone trying to make a density-based durability comparison, because there is no responsible way to fill in those missing specifications from assumption.

Nor does Zinus provide a specific feel category on its product page here. A shopper seeking an explicitly labeled medium option has clearer direction from Amerisleep. A shopper who already knows they want the character of a memory-foam construction may find Zinus’s simpler description sufficient.

Pressure relief and support

HIVE zoned support is the biggest functional separator in this matchup. Amerisleep identifies it as part of the AS3 construction, so the mattress has a defined zoned-support element alongside its Bio-Pur foam comfort layer. That is why the AS3 takes the overall verdict.

“Zoned” should not be treated as a magic word. It is, however, a concrete construction distinction. For shoppers comparing two foam mattresses and wanting a stated support architecture, the AS3 supplies more to evaluate than a basic layer count.

Zinus’s three-layer foam construction does not come with a named zoned-support feature on its official product page. That does not make it unsuitable for every sleeper. It means its appeal is different: a straightforward memory-foam mattress without the AS3’s specific support-system claim.

• For a medium feel: Amerisleep labels the AS3 medium.
• For a named support feature: Amerisleep lists HIVE zoned support.
• For a simpler foam layout: Zinus lists three CertiPUR-US certified foam layers.

Body type, sleeping position, and sensitivity to firmness can change what feels right. Neither brand provides position-specific recommendations in the facts considered here, so I would not assign either mattress to a particular sleep style as if that were established.

Temperature and motion: what the materials do, and do not, tell us

Both choices are foam mattresses, not coil-based designs. Amerisleep identifies Bio-Pur foam in the AS3, while Zinus identifies green-tea-infused memory foam in its mattress. Those are useful material descriptions, but they are not published temperature or motion-performance results.

Amerisleep does not provide a cooling-performance claim in the facts used for this comparison. Zinus likewise does not provide a cooling-performance claim here. I would not promise that either mattress sleeps cooler than the other based solely on its foam names.

The same restraint applies to motion. Foam construction may be relevant to shoppers thinking about movement in bed, but neither manufacturer supplies a motion-isolation measurement or comparison in these details. There is no basis here for declaring a winner on that criterion.

Fiberglass, trial, warranty, and value

Both brands say their current mattress is fiberglass-free. That puts neither model ahead on this particular point, though shoppers who want more context can read our fiberglass-free mattress guide and our explanation of whether Zinus has fiberglass.

The sleep trials are equal on paper: Amerisleep offers 100 nights for the AS3, and Zinus offers 100 nights for the Original Green Tea mattress. Amerisleep says shipping and returns are free under its published terms. No comparable shipping-and-return statement for Zinus is included here, so I would check its current terms before treating the purchase policies as identical.

The warranty is not a tie. Amerisleep lists 20 years for the AS3; Zinus lists 10 years for the Original Green Tea Memory Foam Mattress. For a buyer who weighs stated long-term coverage heavily, that difference favors Amerisleep without needing to speculate about lifespan.

Both manufacturers say their mattress is made in the USA. Amerisleep adds that the AS3 uses domestic and imported parts. Price is deliberately absent from this comparison, so value comes down to which documented design and policy package better matches your priorities, not a temporary sale number.

Who should buy the Amerisleep AS3?

The AS3 is the better pick for the shopper who wants a manufacturer-described medium feel. That is a useful starting point if you do not want to infer firmness from a generic memory-foam label.

It also fits buyers who want a mattress with a named zoned-support design. The 12-inch profile, Bio-Pur foam comfort layer, and HIVE construction create a more specified build than the competing model’s basic three-layer description.

Finally, the AS3 makes sense for someone comparing the written protections closely. Amerisleep’s 100-night trial matches Zinus’s trial, while the longer warranty gives the AS3 the stronger coverage term in this head-to-head.

For a closer look at Amerisleep’s stated materials and policies, see our Amerisleep AS3 review.

Who should buy the Zinus Original Green Tea mattress?

Zinus is the credible alternative for buyers prioritizing a simpler 10-inch green-tea memory-foam construction. Its product description is direct: three CertiPUR-US certified foam layers, including green-tea-infused memory foam.

That simpler design can be a virtue for a shopper who does not need a named zoned-support system or an explicitly labeled medium feel. The mattress still includes a 100-night trial, and Zinus says the current version is fiberglass-free.

Its tradeoff is clear rather than mysterious. Zinus offers a shorter 10-year warranty, and its page does not provide the same firm feel label or named support feature that distinguishes the AS3. Buyers comfortable with that narrower specification can reasonably prefer it.

• Amerisleep AS3 pros: medium designation, Bio-Pur foam, HIVE zoned support, 20-year warranty, and free shipping and returns under Amerisleep’s terms.
• Amerisleep AS3 cons: it is not the simpler 10-inch green-tea memory-foam option.
• Zinus pros: simple 10-inch, three-layer CertiPUR-US certified foam construction with green-tea-infused memory foam.
• Zinus cons: a 10-year warranty and no published exact feel label or named zoned-support feature here.

Final verdict

The Amerisleep AS3 wins this comparison because its construction gives buyers a declared medium feel, Bio-Pur foam, and HIVE zoned support, while Amerisleep provides a 20-year warranty. Those are meaningful, documented advantages for the shopper seeking more than a basic foam-mattress description.

The Zinus Original Green Tea Memory Foam Mattress is not a bad fallback. It has a legitimate lane: the buyer who wants a simpler 10-inch memory-foam build with green-tea-infused foam and three CertiPUR-US certified layers. But for the broader buyer deciding between these exact two mattresses, the AS3 is my pick.

Frequently asked questions

Is Amerisleep or Zinus better overall?

Amerisleep AS3 is the overall winner here because Amerisleep lists HIVE zoned support and a 20-year warranty. Zinus is the more focused option for a buyer who wants a simpler 10-inch green-tea memory-foam design.

Are both mattresses fiberglass-free?

Yes. Amerisleep says the AS3 is fiberglass-free, and Zinus says the current Original Green Tea Memory Foam Mattress is fiberglass-free.

Which mattress is taller?

Amerisleep lists the AS3 at 12 inches. Zinus lists the Original Green Tea Memory Foam Mattress at 10 inches.

Do Amerisleep and Zinus offer the same trial length?

Yes. Amerisleep lists a 100-night trial for the AS3, and Zinus lists a 100-night trial for the Original Green Tea Memory Foam Mattress.

Which one has the longer warranty?

Amerisleep lists a 20-year warranty for the AS3. Zinus lists a 10-year warranty for the Original Green Tea Memory Foam Mattress.