Is the AS3 good for side sleepers?

The medium feel cushions pressure points, and many side sleepers find it comfortable. Lighter side sleepers may want a softer feel.

The Bio-Pur foam and Refresh cooling cover are designed to reduce heat buildup. Most owners say it sleeps cooler than typical memory foam, though very hot sleepers may still notice warmth.

Does it contain fiberglass?

No. Amerisleep builds the AS3 without fiberglass, and the materials are OEKO-TEX and CertiPUR-US certified.

Do I need a box spring or foundation?

A foundation or adjustable base is not included. The mattress works on a flat foundation, platform bed or adjustable base.

How does it compare with the AS2 or AS5?

The AS3 is the middle medium feel. The AS2 is softer and the AS5 firmer, so the AS3 suits shoppers who want one bed for mixed sleep positions.

Yes. It is hypoallergenic and fiberglass-free, and the medium feel works for children as well as adults.

All Travel Tech Clothes Shoes Jewelry Home Beauty Outdoors Toys

This hour's deals

Amerisleep AS3 Medium Memory Foam Mattress

−33%

Home · Amerisleep

Wake up without the mattress creak

Name: Amerisleep AS3 Medium Memory Foam Mattress
Brand: Amerisleep
Availability: InStock

Amerisleep AS3 Medium Memory Foam Mattress

The Amerisleep AS3 medium memory foam mattress for sleepers who want support without the sink.

Deal score 6.2 · Great deal

$999.00$1,499.00 Amerisleep's regular price

You save $500.00 at Amerisleep

This deal was in an earlier drop. The store may have changed its price since.

Why it's a great deal

Amerisleep lists its regular price at $1,499.00: 33% off by its own figures
Rated 4.7 out of 5 by 8,300 buyers
CNET says the AS3's responsive memory foam suits most people and it's great for those wanting medium firmness CNET
Amerisleep says the AS3 adapts to most body types and sleep styles and has enhanced cooling Amerisleep

Visit Amerisleep

Every store we checked

AmerisleepNew
In stock
$999.00Checked 4 h ago
Visit Amerisleep
AmerisleepNew
In stock
$1,249.00Checked 3 h ago
Visit Amerisleep

Price history and every store's price →

From Amerisleep

Best-selling medium-feel mattress tailored to most body types and sleep styles
Plant-based Bio-Pur® memory foam for cooling comfort
HIVE® technology for airflow and targeted support
Fiberglass-free, eco-friendly and non-toxic construction
Refresh Cover stays on average 7 degrees cooler than a traditional 100% polyester cover
Voted #1 Best Mattress 2026 in Newsweek Readers' Choice Awards; endorsed by the American Chiropractic Association

Sizes: Twin, Twin XL, Full, Queen, King, Cal King, Split King
Materials: Plant-based Bio-Pur® memory foam; Refresh Cover knitted with minerals; CertiPUR-US® certified, low in VOCs, fiberglass-free
Fit: Medium feel; 12-inch profile; designed for all sleep styles
Sizing: Medium feel suited to most body types and all sleep styles; available in Twin through Split King.
Care: Use a waterproof mattress protector; rotate head to foot every six months; removable and washable cover
Guarantee: 20-year warranty: full replacement for defects such as sagging over 1.5 inches in the first 10 years, prorated replacement in the second 10 years.
Returns: 365-night risk-free sleep trial with free returns; full refund if not satisfied after the first 30 nights, courier pickup arranged.
Shipping: Free shipping within the continental US via FedEx; most orders arrive in two weeks or less; accessories may ship separately.
Packs: All-foam AS3 and hybrid AS3h (foam + coils) options
In the box: Mattress compressed and shipped in an eco-friendly box

What buyers say

Buyers like

Sleeps cool and breathable
Comfortable yet supportive
Relieves pressure points and back pain
Eco-friendly and fiberglass-free
Helps restless sleepers and couples
Made in the USA

Specs

Firmness Level: Medium
Mattress Type: Memory Foam
Type: Mattress
Length: 84 in (Cal King)
Width: 76 in (King)
Certifications: OEKO-TEX certified materials, CertiPUR-US
Core Material: Bio-Core base layer, Foam
Cover Material: Refresh Cooling Cover
Material: Memory Foam/Fiberglass Free
Foundation Type: Adjustable Base

About the Amerisleep AS3 Medium Memory Foam Mattress

The Amerisleep AS3 is a medium-firm memory foam mattress sold bed-in-a-box, built on plant-based Bio-Pur foam over a Bio-Core base. Its Refresh cooling cover and breathable foam target hot sleepers, and the medium feel is meant to work for back, side and stomach sleepers of most body types. It is fiberglass-free and OEKO-TEX and CertiPUR-US certified, which matters to shoppers avoiding fiberglass and harsh chemicals. Against rivals like Tempur-Pedic and Nectar, it sits in the middle on firmness and leans on cooling and non-toxic materials rather than a hybrid coil build. Owners rate it highly overall, though some find the medium feel too firm or too soft for their taste.

Best forBack, side and stomach sleepers wanting one medium feelHot sleepers who overheat on traditional foamShoppers avoiding fiberglass and harsh chemicalsCouples and most body types wanting an all-foam bed

Pros

Medium feel suits a wide range of sleep positions
Plant-based Bio-Pur foam with cooling cover
Fiberglass-free construction
OEKO-TEX and CertiPUR-US certified materials
Hypoallergenic and kid-friendly

More deals like this