Amerisleep AS2 vs. Plank Firm: Which Firm Mattress?

Amerisleep AS2 vs Plank Firm at a glance

Compare firmness, trial terms, return fees and warranty coverage before choosing. Prices and promotions can change.

Why the AS2 is our overall winner

The AS2 earns our pick for its medium-firm feel, 12-inch profile, Bio-Pur foam, and HIVE zoning. Choose Plank Firm if extra-firm support and a reversible design matter more than cushioning.

Construction: zoned foam or a flippable firm surface?

The AS2 starts with Bio-Pur memory foam, which Amerisleep describes as plant-based and open-cell, over its HIVE support technology and a durable base. HIVE is Amerisleep’s zoned design for differentiated support through the mattress. This gives the AS2 a layered, zoned construction rather than one uniform firm surface. Amerisleep lists the mattress at 12 inches and says it is fiberglass-free.

Plank Firm takes a more direct route to firmness. Brooklyn Bedding lists it as a 10-inch, four-layer mattress with a quilted top, a 6-inch high-density base foam, 2 inches of Supreme Response Comfort Foam and a quilted bottom. It is designed to be flipped: one face is firm and the other extra firm. The sides make this mattress unusual; instead of choosing one fixed firmness at checkout, you can turn it over and use the other surface.

That flippability is useful only if both faces sound appealing. If you already know that extra-firm beds feel too hard to you, the second side may still be too firm. Conversely, if most “firm” mattresses feel too soft, Plank’s extra-firm side gives you a more decisive option than the AS2. Neither product page supplies foam-density figures that would let us compare the foam by density, so do not use an assumed density or a generic durability ranking to settle the choice.

Firmness and feel by sleep position

Side sleepers: Start with the AS2 if you want a firm bed with some shoulder and hip cushioning; Plank’s firm faces may feel too hard if you need more give.

Back sleepers: Choose by feel: the AS2 is the moderate option, while Plank suits those who prefer very little sink.

Stomach sleepers: Amerisleep recommends the AS2 for back or stomach sleepers. If you prefer a particularly rigid surface, consider Plank’s extra-firm face.

Combination sleepers: The AS2 is the gentler starting point when you change positions; Plank lets you switch between firm and extra-firm, not between different constructions.

Cooling, edges and motion

Amerisleep describes its Refresh cover and open-cell Bio-Pur foam as cooling features; Brooklyn Bedding offers an optional GlacioTex cover it describes as cool to the touch. Those are brand claims, not comparable temperature results. Neither product page supplies a head-to-head motion-transfer or edge-support measurement, so treat those performance questions as unmeasured.

Prices by size

Amerisleep lists the AS2 Queen at $1,549 regular / $1,049 sale. Plank Firm’s listed prices are shown below before the advertised 25% sitewide discount code ANNI25. Promotions may have eligibility rules, and the optional Plank cooling cover may add cost; compare the same size and configuration.

Brooklyn Bedding lists these Plank Firm prices before its advertised 25% code: Twin $749, Twin XL $849, Full $999, King and California King $1,532. Its product page lists Queen at $1,332. Optional GlacioTex cover and promotion eligibility can change the checkout total.

Trial, returns, warranty and delivery

Check the return window and minimum break-in period before you order; a longer trial does not remove return conditions.

Amerisleep AS2: Amerisleep advertises a 100-night trial and free returns; its warranty lasts 20 years, with full replacement coverage in years 1–10 and prorated coverage in years 11–20. It covers a visible indentation greater than 1.5 inches, subject to the terms. Amerisleep’s warranty requires a suitable solid or slatted foundation; slats must be no more than 2.75 inches apart. A box spring requires a solid plywood layer at least 0.75 inch thick. Amerisleep’s shipping estimate is 3–7 business days. During years 11–20, a replacement costs 50% of the original purchase price, plus shipping and labor; transportation costs are also excluded from the first decade’s coverage.

Plank Firm: Brooklyn Bedding advertises a 120-night trial and a limited lifetime warranty. Its product page currently lists shipping in 5–8 business days; Brooklyn Bedding charges a $99 return fee. The trial terms require at least 30 nights before a return and allow one trial per household. Its trial is 20 nights longer, but the fee reduces the value of that extra time.

Trial eligibility and warranty coverage are separate. Compare each written warranty’s coverage, exclusions, and foundation rules; the headline durations do not establish that one has broader protection.

Who should buy each mattress?

• AS2 pros: more moderate medium-firm feel, zoned foam design, free returns advertised by Amerisleep.
• AS2 trade-off: shorter trial than Plank Firm and a fixed firmness.
• Plank Firm pros: reversible firm/extra-firm faces and a longer trial.
• Plank Firm trade-off: Brooklyn Bedding charges a $99 return fee, and both faces are firm.

Choose the Amerisleep AS2 if you want a medium-firm mattress rather than an extra-firm one; sleep on your back or stomach and want a defined foam support system; prefer Bio-Pur and HIVE as named design features; or value Amerisleep’s 100-night trial. Amerisleep lists the Queen at $1,049 sale / $1,549 regular.

Choose Plank Firm if you actively seek a very firm surface; want one mattress with firm and extra-firm faces; prefer a lower listed pre-discount price; or want a longer trial window. Brooklyn Bedding advertises 120 nights, but charges a $99 return fee. It is the better match if extra-firm feel is your priority.

Who should NOT buy the AS2: Skip it if you want an extra-firm surface, a flippable mattress, or a plush feel. Its advertised medium-firm feel is not the harder option here.

Who should NOT buy Plank Firm: Avoid it if you want noticeable cushioning, a coil hybrid, or you do not want to pay a $99 return fee if it is not right for you.

Also considered

• Amerisleep AS3: consider this if you want a softer, more pressure-relieving feel than the AS2; it is not the firm-focused choice in this matchup.
• Plank Firm Luxe: Brooklyn Bedding’s separate hybrid version adds coils, so it suits shoppers who want firm support with a different construction.
• Amerisleep AS1: a simpler firm alternative in Amerisleep’s lineup; compare its current specs and terms before choosing.

Final verdict: AS2 for the more versatile firm feel

Choose Plank Firm instead if you actively want an extra-firm face, value a flippable design, and accept its longer trial’s $99 return fee. For a firm feel with more give, start with the AS2.

Frequently asked questions

Is the AS2 firmer than Plank Firm?

No. Amerisleep calls the AS2 medium-firm; Plank Firm has firm and extra-firm faces.

Can you flip the AS2?

Amerisleep does not describe the AS2 as flippable. Plank Firm is designed to be flipped between its two firmness faces.

Which has the longer trial?

Plank Firm has a 120-night trial and a $99 return fee; Amerisleep advertises 100 nights with free returns.

What does Amerisleep’s warranty cover?

Amerisleep’s 20-year mattress warranty covers qualifying defects, including indentations over 1.5 inches, subject to its terms. Brooklyn Bedding lists a limited lifetime warranty for Plank Firm; compare the written coverage and exclusions.