Amerisleep AS3 vs AS4 vs AS5: Which Model Is Right for Your Sleep Style?

The AS3 is Amerisleep's medium-feel all-rounder — works for most sleep positions. The AS4 goes softer, built for side sleepers who need shoulder and hip relief. The AS5 is the plushest option, aimed squarely at strict side sleepers and lighter-weight people who want maximum pressure relief. Not sure where you land? Default to the AS3.

Amerisleep AS3 vs AS4 vs AS5: Side-by-Side Model Comparison (2026)

Amerisleep makes this choice harder than it should be. Three models, nearly identical names, similar construction, overlapping use cases. What follows breaks down exactly where they diverge — so you can pick without second-guessing yourself.

Quick Specs at a Glance

Feature	AS3	AS4	AS5
Firmness	Medium (5/10)	Medium Soft (4/10)	Soft (3/10)
Height	12"	13"	14"
Top Comfort Layer	3" Bio-Pur® foam	3" Bio-Pur® foam	4" Bio-Pur® foam
Transition Layer	2" Affinity foam	2" Affinity foam	2" Affinity foam
Support Core	7" Bio-Core®	8" Bio-Core®	8" Bio-Core®
Best For	Back, combo sleepers	Side sleepers, couples	Strict side, lightweight
Price (Queen, approx.)	~$1,399	~$1,599	~$1,799

Prices before coupons. Amerisleep frequently runs 20–30% off promotions — check amerisleep.com for current deals.

Where They Actually Differ

Firmness and Feel

Each model uses the same Bio-Pur® open-cell foam and Bio-Core® base. What changes is the thickness and density of the comfort layers. That extra inch of top foam in the AS5 — compared to the AS3 — translates into noticeably deeper contouring. Not just on paper, either. You'll feel it within the first 30 seconds of lying down.

Sleep Foundation's Amerisleep review found the AS4 and AS5 score higher on pressure relief testing, especially at the shoulder point for side sleepers.

Motion Isolation

All three are all-foam builds, so motion transfer is low across the board. The AS4 and AS5 absorb movement slightly better because of thicker comfort layers. For couples with mismatched sleep schedules, any of the three will outperform innerspring or hybrid options.

Edge Support

Here's where the softer models give something back. The AS5 compresses more at the edges under seated weight. If you sit on the side of the bed to get up — or share the mattress and sleep near the edge — the AS3 holds firmer. Not a dealbreaker, but worth knowing before you order.

Temperature

Bio-Pur® foam runs more breathable than traditional memory foam. Open-cell foam mattresses in this price range sleep 2–4°F cooler than closed-cell alternatives, according to testing reviewed by Consumer Reports. The AS5's thicker comfort layer retains slightly more heat than the AS3 does, though most average sleepers won't notice the gap.

Who Should Buy Each Model

Choose the AS3 if you:

• Sleep on your back or switch positions through the night
• Weigh between 130–230 lbs
• Want a balanced feel — not too firm, not too soft
• Share the bed and need reliable edge support
• Are buying your first Amerisleep and want the lowest-risk choice

Choose the AS4 if you:

• Sleep primarily on your side
• Wake up with shoulder or hip soreness on firmer mattresses
• Weigh between 130–230 lbs
• Want softness without going full plush
• Share with a partner who runs warm — the AS4 still sleeps cooler than dense foam alternatives

Choose the AS5 if you:

• Are a dedicated side sleeper who never rolls onto your back
• Weigh under 150 lbs (lighter sleepers don't compress softer foams enough to bottom out)
• Deal with chronic shoulder or hip pressure point pain
• Prefer a cradling, sink-in feel over buoyancy

The Weight Factor Nobody Mentions

Firmness ratings are tested at an assumed body weight. Over 230 lbs, the AS5 may feel more medium than plush — and the comfort layer will likely compress faster over time. Heavier sleepers tend to get better long-term value from the AS3 or AS4. Under 130 lbs, the AS3 can feel firmer than its 5/10 rating implies, which makes the AS4 worth a look even for back sleepers.

Practical Decision Checklist

Run through this before you order:

1. What position do you sleep in 80%+ of the time? Side → AS4 or AS5. Back/stomach → AS3.
2. Do you currently wake up with pressure point pain? Yes → go one model softer than you think you need.
3. What's your body weight? Under 130 lbs → consider AS4 or AS5. Over 230 lbs → stick with AS3.
4. Do you share the bed? If yes, factor in your partner's weight and position too.
5. Have you tried a foam mattress before? No → the AS3 is a safer first step. The AS5 is an acquired preference.

Amerisleep backs all three models with a 100-night sleep trial. Pick wrong and you can return it — but running through this checklist first saves the hassle.

Frequently Asked Questions

Is the Amerisleep AS4 good for back pain?

For side sleepers whose lower back pain comes from pressure points at the hips, the AS4 works well. Back sleepers with lower back issues usually get better spinal alignment from the AS3's firmer support. The right answer depends on your sleep position, not just the symptom.

How does the AS3 compare to the AS4 for couples?

Both isolate motion well. The AS3 edges ahead on edge support, which matters when you share the mattress and sleep toward the sides. When one partner is a side sleeper and the other sleeps on their back, the AS4 is a reasonable middle ground.

Can a stomach sleeper use the AS4 or AS5?

Not recommended. Stomach sleepers need firm support to keep hips from sinking and prevent the lower back from arching. Both the AS4 and AS5 are too soft for that position — look at the AS1 or AS2 instead.

Are Amerisleep AS4 reviews generally positive?

Among side sleepers in the 130–200 lb range who previously slept on firmer mattresses, yes. The most common complaint is that heavier sleepers find it compresses more than expected within the first year. Lighter sleepers rate it consistently high for pressure relief.

Does Amerisleep offer discounts on these models?

Sales run regularly — especially around major holidays. Discounts of 20–30% off are common. Check current coupon codes before ordering, since the list price rarely reflects what people actually pay.

Автор: MattressMart Columbus Editorial. Обновлено: 2026-10-09