Amerisleep AS2 Mattress Reviews (2026)

After several weeks, the AS2 came across as steady, medium-firm foam with a clear support-first feel. In our tests, the AS2’s zoned support helped keep the midsection from dipping on back and stomach sleep. It is not the plushest option in this category, and the sitting edge still dipped when I perched to get dressed, but it delivered the kind of stable alignment many back and stomach sleepers want.

• Who It’s For

  • Back sleepers who want medium-firm alignment

  • Stomach sleepers who dislike deep sink

  • Couples who care about motion isolation

• Who It’s Not For

  • Side sleepers with very sensitive shoulders

  • People who sit on the edge for long stretches

  • Anyone who wants a bouncy, springy response

I slept on the AS2 for 21 nights, rotating through back and side positions and using short stomach-sleep checks to see whether the hips stayed lifted. Marcus ran hot-sleeper sessions with heavier bedding to see how quickly the surface warmed up and released heat. Jenna and Ethan handled partner-movement drills, sit-and-stand routines, and edge-perch checks. We also timed bounce-back after compression and watched for any week-to-week shift in feel. The scores below reflect Support, Cooling, Pressure Relief, Motion Isolation, Responsiveness, Edge Support, and Durability on a 5-point scale, following our broader How We Test Mattresses process.

The AS2 felt calm and controlled from the first night. On my back, there was a noticeable bit of extra hold under the midsection, which kept the kind of lower-back pressure we watch for from building up too quickly. On my side, the surface had enough give to stay comfortable, but I needed the right pillow height or my shoulder started to feel perched. Marcus thought the cover stayed cooler than older foam beds early in the night, though the mattress still held more heat than a hybrid once we stayed still under heavier bedding. The main weakness showed up at the edge: it felt stable enough for quick perches, but it compressed more than we wanted when we sat there for longer.

• What we liked

  • Steady midsection support that kept the spine from bowing

  • Very low motion transfer for an all-foam build

  • Faster response than many classic memory-foam beds

• Who it is best for

  • Back sleepers dealing with mild lower-back tightness

  • Stomach sleepers who need their hips held up

  • Couples who wake easily when a partner moves

• Where it falls short

  • Side sleepers who need deeper shoulder cushioning

  • People who want fast, springy rebound

  • Anyone who dresses at the edge every morning

• Type: all-foam mattress; Height: 12 inches; Firmness: medium-firm (about 6/10).

• Cover: Refresh cover designed to pull heat away from the body; Amerisleep says it can help the surface sleep up to 7 degrees cooler.

• Comfort layer: 2 inches of Bio-Pur open-cell, plant-based memory foam.

• Transition layer: 3 inches of Affinity foam with HIVE zoned support, with softer zones under the head, shoulders, and legs and firmer support through the back and hips.

• Base layer: 7 inches of Bio-Core support foam.

• Construction: fiberglass-free.

• Sizes: Twin, Twin XL, Full, Queen, King, Cal King, Split King.

• Shipping and returns: free; Trial: 100 nights; Warranty: 20 years.

• Country of origin: made in the USA with U.S. and imported components; covers sewn in Canada.

Choose the AS2 if you want a medium-firm, all-foam mattress that keeps the midsection lifted and limits partner disturbance. It makes the most sense for back sleepers, many stomach sleepers, and couples who care more about control than bounce. If you are a dedicated side sleeper with sensitive shoulders, a plusher surface or a pillow-top hybrid will usually feel easier on pressure points. Hot sleepers may appreciate the cooling cover, but the AS2 is still a foam mattress, so breathable bedding matters. If you want more cushioning at the shoulder and hip, Helix Midnight Luxe is the softer, more pressure-relieving alternative. If you want deeper, denser contouring and do not mind slower movement, Tempur-Pedic TEMPUR-Adapt is the closer memory-foam alternative.

The AS2’s medium-firm tuning is supportive, but it can feel a little flat if you rely on deep shoulder contouring to stay comfortable on your side. The all-foam build also means the edge is better for lying than sitting; prolonged edge perching compressed noticeably in our routines. And while it rebounds faster than some slow-moving foam beds, it still will not give you the springy assist that a hybrid can provide if you change positions constantly.

• Why choose these models

  • Medium-firm, zoned foam support that keeps the midsection from sinking too low

  • Cooler surface feel than many older memory-foam beds

  • Excellent motion isolation for couples

• Alternatives to consider

  • Saatva Loom & Leaf: a more premium memory-foam feel with deeper body contouring

  • Tuft & Needle Original: a more responsive foam feel for easier turning

  • Tempur-Pedic TEMPUR-Adapt: deeper pressure relief, but slower movement across the surface

• Give the mattress a short break-in window before judging firmness day to day.

• If side sleeping feels firm at the shoulder, adjust pillow loft first; a slightly higher loft often fixes neck angle on medium-firm foam.

• Use breathable sheets to keep the surface feeling cooler.

• Skip thick foam toppers unless you are intentionally softening the feel; they can blunt the zoning benefit.

• Rotate the mattress head to foot a few times per year to keep wear more even.

• If you sit on the edge to dress, vary where you perch to reduce repeated compression in one spot.

• Pair it with a supportive, flat platform or sturdy slats to keep the support feel consistent.

• For couples, keep a stable frame and tighten hardware; a quiet mattress still needs a quiet base.

• If you are sensitive to foam warmth, avoid heavy duvet stacks and consider a lighter blanket layer.