AS4

Starting at $1399  $1199
Available in 7 sizes
AS4
AS4
AS4
AS4
AS4
MEDIUM SOFT FEEL Profile height: 12-inch

AS4

Our medium-soft mattress offers plush comfort with targeted support that helps you sleep your best. Plus it stays cool all night, making it our most popular model with side sleepers.

  • Twin (38" x 74") $1399
  • Twin XL (38" x 80") $1449
  • Full (54" x 75") $1549
  • King (76" x 80") $1899
  • Queen (60" x 80") $1699
  • California King (72" x 84") $1899
  • Split King (38" x 80" - 2) $2698
Amerisleep foundation
Amerisleep Foundation

Perfectly support your mattress

+ $275
$1699 $1499 with promo
save $200.00
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Better sleep through better design

Sleep Cooler

Sleep Cooler

Comfort You Will Love

Comfort You Will Love

Tested to Last

Tested to Improve Sleep

More Support, Deeper Sleep

Alleviates Pressure Points

Eco-Friendly Production

Eco-Friendly Production

Stays cool all night

Our plant-based Bio-Pur® material keeps you cool all night. It features an open-cell design that allows more air to escape than traditional foam.

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Open-cell design wicks away warm air

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More breathable than traditional foam

Relieves pain & pressure points

Our Bio-Pur® comfort layer contours to your body and relieves pain-causing pressure points. But it also bounces back fast, so you never feel “stuck” if you move around at night.

Zoned comfort icon

Soothing pressure point relief

Pressure point icon

More responsive than traditional foam

Crafted for lasting comfort

We make our mattresses here in America with the highest quality craftsmanship. They’re built to last and backed by a two-decade warranty.

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Industry-leading 20-year warranty

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Won’t sag or develop soft spots

Made with side sleepers in mind

Our medium-soft mattress offers plush comfort with targeted support that helps you sleep your best.

Amerisleep AS4 mattress cover Amerisleep AS4 mattress layers
Increased Blood Flow for Deeper Sleep

FDA-determined Celliant® technology reflects your body’s heat back as infrared light, which increases local blood flow to promote more restful sleep.

Stays Cool & Never Feels “Stuck”

Bio-Pur®’s open-cell design keeps you cooler than traditional foam. It also contours to your body to relieve pressure points and bounces back fast, so you won’t feel “stuck”.

Targeted Pressure-Relief System

Our HIVE® transition layer provides targeted support and pressure relief so you can sleep in perfect alignment. It gives your head, back, and legs more support, and your shoulders and hips more cushion.

Durable Support for Decades

The Bio-Core® base layer gives you durable support that lasts for decades. It won’t sag or develop soft spots over time. (And we prove it with our 20-year warranty.)

Sleep in perfect alignment

Our HIVE® transition layer gives your body targeted support to ease tension and help you sleep in perfect alignment. It provides added support under your head, back, and legs. And it gives your shoulders and hips extra cushion. We’ve also designed HIVE® to reduce pain-causing pressure points.

Enjoy deeper sleep and more daily energy. Try the AS4 for 100 nights.
100 Night Trial
Risk-free, 100-night trial
with free shipping & returns

Specifications

 
Available sizes
(inches)
  • Twin 38" W x 74" L x 12" H
  • Twin XL 38" W x 80" L x 12" H
  • Full 54" W x 75" L x 12" H
  • Queen 60" W x 80" L x 12" H
  • King 76" W x 80" L x 12" H
  • Cal King 72" W x 84" L x 12" H
  • Split King 38" W x 80" L x 12" H (x2)
 
Free Shipping

Amerisleep mattresses come with fast and free shipping within the continental US. We ship our mattresses compressed in an eco-friendly box using FedEx. And in most cases they arrive in a week or less.

 
20-Year Warranty

Amerisleep mattresses are backed by an industry-leading 20-year warranty. For the first 10 years, we will replace your mattress if you encounter any defects, including sagging greater than 0.75”. And for the second 10 years, we will offer you a prorated replacement.

Upgrade your mattress with our complete sleep system

Amerisleep pillow
Go ahead and relax

Shop our lineup of pillows engineered for better head and neck support.

Browse Pillows
Amerisleep bedding
Wrap yourself in luxury

Explore our suite of bedding options designed for exceptional softness and comfort.

Browse Bedding
See what our satisfied sleepers have to say

All reviews are unaltered and verified by a 3rd party.

*Reviews

All featured customer reviews are unaltered and verified by PowerReviews. The comments made by customers are not intended as advertisements, and should be understood as the perspective of each individual based on their experience. These reviews should not be construed to mean that these experiences are universal or that results will always be the same.

Frequently asked questions

 
What does the Amerisleep AS4 feel like?

The AS4 contours to your whole body and has extra cushion for your hips and shoulders.

 
Do I have to flip or rotate my mattress?

No, we use durable materials designed to last for decades. They won’t sag or develop soft spots, and the Celliant® cover should always face upward.

 
What kind of bed sheets should I use with my mattress?

Thick sheets can trap heat and reduce the breathability of our mattresses. We recommend you pair your Amerisleep mattress with our luxurious and breathable bedding.

 
Where can I try the Amerisleep AS4?

The best place to try a new mattress is in your own home. That’s why we offer a risk-free, 100-night trial. It lets you experience the best your mattress has to offer, and if you don’t love it we’ll give you a full refund.

But if you do want to try the Amerisleep AS4 in person, you can visit one of our retail locations. (You’re still covered by the 100-night trial, even if you order in one of our stores.)

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100 night trial. Free shipping & returns.

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