AS4

Formerly known as Colonial

The AS4 is our medium-soft mattress. It’s great for side sleepers, and anyone who likes more cushioning while they’re in bed. We combine our proprietary, cooling Bio-Pur™ foam and Affinity with SMT comfort foam layers to create a soft but responsive feel that relieves pressure points and makes you feel like you’re floating. Plus the high-performance Celliant® cover is made with thermoreactive yarn to safely turn body heat into infrared. Your comfort is guaranteed.

Profile height: 12-inch Feel: Medium Soft
Size
Price
$1699 $1499 with promo
Save $200.00

Due to high demand, mattresses may take up to 3 weeks to ship.

 

Wonderful bed!!

My husband and I have both noticed a reduction in back pain and better overall sleep.

By 

from Phoenix AZ

About Me Midrange Shopper

 

LOVE THIS MATTRESS

Fast Shipping Customer Service was great! Loving this new bed!! I purchased the whole set up mattress frame pillows and mattress topper....Worth the money!!

By 

from Greensboro NC

About Me Midrange Shopper

All featured customer reviews are unaltered and verified by PowerReviews (view disclaimer).

No mattress is more carefully engineered.
  • For Back & Stomach Sleepers

  • For Side & Combo Sleepers

  • AS1

    Formerly Americana

    Firm

  • AS2

    Formerly Revere

    Medium Firm

  • AS3

    Formerly Liberty

    Medium

  • AS4

    Formerly Colonial

    Medium Soft

  • AS5

    Formerly Independence

    Soft

Too firm:
Pressure Points

(Futon mattress)

Too soft:
No support

(Pillow top mattress)

High-Performance Celliant® Cover

Celliant® is an advanced fabric made with 13 thermoreactive minerals that helps improve the performance of the mattress.

Extra-Breathable cooling layer

Our Bio-Pur™ foam is five times more breathable than traditional memory foam, because of it’s advanced open-cell structure. It wicks away heat while you sleep and can help keep you cool and comfortable.

Enhanced "Feels-like-you're-floating" layer

The Affinity layer with Surface Modification Technology (SMT) is our ergonomic transition foam. It has “zones” that provide extra pressure relief in key areas like the shoulders and lower back, along with precision-cut channels that carry away even more heat and moisture. It’s enough to make you feel like you're weightlessly resting on a cloud.

Sag-free & Eco-friendly Support

Our Bio-Core™ foam support layer won't sag even after decades of use. And, like our Bio-Pur™ foam, it’s partially made from plants instead of petroleum so it’s eco-friendly.

Tested to get you more sleep.

Amerisleep mattresses are expertly designed to help you get more sleep — guaranteed. Our mattresses are built with performance in mind down to the last detail. That even includes the cover, which is a critical part of a mattress because it's the layer closest to your body when you sleep.

Amerisleep is officially licensed to use Celliant® in our covers. This advanced fabric combines 13 minerals into thermoreactive yarn that converts body heat into infrared.

We created a superior memory foam that helps keep you cool.

Traditional memory foam is made from dense material, so it traps your body heat and can make you sweaty and uncomfortable while you’re in bed — and who can sleep like that?

We developed our foam with an enhanced "open cell structure," which means there is more air space between the foam particles. That space wicks away heat while you sleep, and can keep you cooler and more comfortable. Remember, you have 100 nights to try it for yourself - if you don't love it, give us a call and we'll pick up the mattress and refund you completely!

On top of that, our foam is also the most environmentally friendly. Our patented foam-making process uses plants to replace some petroleum, and is the only manufacturing method that exceeds the standards of the Clean Air Act.

More comfort. Less “stuck”.

Our foam is also better than traditional memory foam because it recovers its shape faster. With a typical foam mattress, you often wind up “stuck” when you change positions but the mattress is still holding your previous shape. That’s because it takes around 60 seconds for the foam to bounce back.

Ours bounces back in just four seconds, so as you move at night your mattress keeps up with you, providing superior comfort.

 

Super Comfy!

I'm getting the best sleep ever! My Fitbit tracker shows my awake and restless times were cut in half.

By 

from Chandler AZ

About Me Midrange Shopper

 

Most Comfortable Bed Ever

I sleep on this bed every night and it is very comfortable. plus..it is made in America! Would order more products from Amerisleep and highly recommend to others.

By 

from Albany New Yor

About Me Midrange Shopper

All featured customer reviews are unaltered and verified by PowerReviews (view disclaimer).

Use it on any frame you want (even none!)
Directly on the floor

No furniture, no problem. You can put your Amerisleep mattress directly on the floor.

Box Spring

If you want to use your existing box spring, place a piece of 3/4” moisture resistant plywood directly on top.

Flat or slatted frame

A flat platform will work perfectly, so long as the gaps between the slats are no more than three inches apart.

Adjustable Base

Adding an adjustable base can elevate your comfort, allowing you to read or watch tv in bed.

What would you do with more energy
and less pain?

Imagine waking up each morning with no pain and increased energy. How would that change the way you approach your day? Would you finally be able exercise regularly? Would you be able to perform better at work instead of constantly feeling groggy and needing another cup of coffee?

Sleep quality is so important because we spend about a third of our lives in bed!

That means, besides our jobs and our families, our sleep probably has the biggest impact in our quality of life. The number of daily problems that go away with a good night’s sleep is astounding — but that only happens if you actually do something to improve your sleep.

If you just keep things the same, you’ll keep getting the same disappointing results. And don’t you deseve better?

 

Awesome

By 

from Reno NV

About Me Midrange Shopper

 

Extremely comfortable

By 

from CA

About Me Midrange Shopper

 

Wish we had this bed 10 years ago!

By 

from VT

About Me Midrange Shopper

 

Geat quality

By 

from Campbellsville

About Me Midrange Shopper

All featured customer reviews are unaltered and verified by PowerReviews (view disclaimer).

100 Night Trial, Free Returns
Learn more about our 100 Night Sleep Trial
Sleep Trial & Warranty Information
Back to Front
 

very comfortable

This mattress is used on our spilt-king adjustable frame and it feels very good.Most of the time when I go to bed at night I watch TV for an hour but I fall asleep with in ten minutes. The mattress is not too firm but just right and I get a good night sleep. I looked at many mattress and and I glad I choose the colonial mattress from amerisleep.

By 

from St.Augustine Fl

About Me Midrange Shopper

All featured customer reviews are unaltered and verified by PowerReviews (view disclaimer).

We use more eco-friendly memory foams.
Yet another way we’re better.

Amerisleep is one of the most eco-friendly mattress companies. From the way we make our foam all the way through how it arrives at your door, we work hard to use processes that are sustainable — literally from start to finish.

First, our patented Variable Pressure Foaming (VPF) process allows us to use plant-based materials to replace some petroleum, so it's better for the environment. It also reclaims and recycles any waste, so there is no air pollution. It's the only process for making foam that meets the Clean Air Act's standards.

Once we've made your mattress, we pack it up in a box made from post-consumer materials before shipping it to your door. Being more eco-friendly is just one more thing that makes our mattresses different than our competitors.

Plant-based
Formula

Zero emissions
manufacturing

eco-box
delivery

Fast, Easy & Free Shipping

Your mattress ships to you compressed in an eco-friendly box small enough that we can use FedEx. That means it gets to you quickly, usually within a week of your purchase!

 

This is an incredibly comfortable mattress. Worth every dime

Except for my occasional bouts of insomnia I'm enjoying the best sleep of my life due vastly to this mattress

By 

from Medford OR

About Me Midrange Shopper

 

This is our 4th Mattress!

Amazing product and very happy with the quality of the Colonial bed. Recommend it!

By 

from Gilbert Az

About Me Midrange Shopper

All featured customer reviews are unaltered and verified by PowerReviews (view disclaimer).

See what our customers have to say -
don't you wish you slept this good?

All featured customer reviews are unaltered and verified by PowerReviews (view disclaimer).

REVIEW SNAPSHOT®

by PowerReviews
AmerisleepAS4
 
4.7

(based on 505 reviews)

Ratings Distribution

  • 5 Stars

     

    (381)

  • 4 Stars

     

    (99)

  • 3 Stars

     

    (17)

  • 2 Stars

     

    (4)

  • 1 Stars

     

    (4)

97%

of respondents would recommend this to a friend.

Pros

  • Comfortable (455)
  • Good support (437)
  • Holds shape (372)
  • Soft feel (353)
  • Durable (283)

Cons

  • Too hard (53)
  • Too soft (12)
  • Develops cavity (11)

Best Uses

  • Primary bed (485)
  • Guest bed (32)
    • Reviewer Profile:
    • Midrange shopper (349), High-end shopper (100), Budget shopper (42)

Reviewed by 505 customers

Displaying reviews 1-10

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5.0

Worth the purchase

By 

from New Orleans

About Me Midrange Shopper

Verified Buyer

Pros

  • Comfortable
  • Soft Feel

Cons

    Best Uses

    • Primary Bed

    Comments about Amerisleep AS4:

    had this mattress for about 2 months and its been great from day one. Perfect for Combo sleepers. Does not sleep hot.

     
    5.0

    Blessed

    By 

    from New Albany, Indiana

    About Me Midrange Shopper

    Verified Buyer

    Pros

    • Comfortable
    • Good Support
    • Holds Shape
    • Sturdy

    Cons

    • Too Hard

    Best Uses

    • Primary Bed

    Comments about Amerisleep AS4:

    I had a little trouble getting used to the mattress because it was a little harder than our last bed. I gave it some time and amerisleep sent us a comfort cushion layer. It helped tremendously and we're loving our new mattress now.

    Service and delivery comments:

    Delivery was prompt and everything was great. They were quick to respond to any questions, concerns, or problems we had. They sent the comfort layer and everything is great.

     
    4.0

    So far .....so good!

    By 

    from Prescott AZ

    Verified Buyer

    Pros

      Cons

        Best Uses

        • Primary Bed

        Comments about Amerisleep AS4:

        Time will depend if it holds up

         
        1.0

        I would not buy this again

        By 

        from Gray, LA

        About Me High-end Shopper

        Verified Buyer

        Pros

        • Holds Shape

        Cons

        • Too Hard

        Best Uses

        • Primary Bed

        Comments about Amerisleep AS4:

        it is in the master room for myself and my husband. It is a king size. I bought the first one which was a Med and it was to hard. Switched it out to a Sq4? The Med/soft, paid the difference and it is still a hard mattress. I am very disappointed. Want to return it. Will take the softest one if it is truly soft. If not, I want a refund

         
        5.0

        The Best Bed I've Ever Slept In

        By 

        from Raleigh, NC

        About Me Midrange Shopper

        Verified Buyer

        Pros

        • Comfortable
        • Good Support
        • Holds Shape
        • Soft Feel
        • Sturdy

        Cons

          Best Uses

          • Primary Bed

          Comments about Amerisleep AS4:

          Every night when we get into bed we actually say "I love this bed so much". Every night. We can't help it, it's that comfortable.
          I did a lot of research before going with Amerisleep and I'm so glad that I did. This bed is the most comfortable bed I've ever slept in. I highly recommend it to my friends and family. We had an inner spring mattress before we got the Amerisleep AS4. I used to wake up several times a night. I'd also wake up my girlfriend getting out of bed. Now I easily sleep through the night. If I get up I do so without disturbing her because the motion transfer is so minimal. Also the mattress sleeps cool. I never have a problem being too hot. It's really incredible.
          I've sleep on several Temprapedic beds. The original Teprapedic can only be described as uncomfortable compared to this Amerisleep mattress. The only ones that are comparable to my AS4 are twice the price.
          Bottomline I strongly believe that the Amerisleep Matress is the best value mattress you can buy.

           
          5.0

          Perfect amount of support and comfort

          By 

          from Camarillo, CA

          About Me Midrange Shopper

          Verified Buyer

          Pros

          • Comfortable
          • Good Support
          • Holds Shape
          • Soft Feel
          • Sturdy

          Cons

            Best Uses

            • Primary Bed

            Comments about Amerisleep AS4:

            We really love this bed. We originally had a casper bed, but we switched because we wanted something a little softer. This was the perfect blend of support and softness.

             
            5.0

            A wonderful bed!

            By 

            from Houston, TX

            About Me Budget Shopper

            Verified Buyer

            Pros

            • Comfortable
            • Good Support
            • Holds Shape
            • Soft Feel

            Cons

            • Motion transfer not completely gone

            Best Uses

            • Primary Bed

            Comments about Amerisleep AS4:

            My husband and I went from a pillowtop BeautyRest Simmons Heavenly bed, and we have not looked back! This bed is just as "comfy" but offers more support! We also went from a queen to a King, so although I can feel him if he rolls over or moves, it's not all that bad cause we have more space. 2 months in and we plan on keeping this bed. As side sleepers, we've been very comfortable with the A4 selection!

             
            4.0

            LOVE!

            By 

            from Chicago, IL

            About Me Midrange Shopper

            Verified Buyer

            Pros

            • Comfortable
            • Good Support
            • Holds Shape
            • Soft Feel
            • Sturdy

            Cons

              Best Uses

              • Primary Bed

              Comments about Amerisleep AS4:

              Love this mattress! I don't feel as much pain in the morning as I used to with a spring mattress. The only negative thing is that in the summer, it can retain a little heat.

               
              1.0

              Side Sleepers Beware

              By 

              from San Diego, CA

              About Me High-end Shopper

              Verified Reviewer

              Pros

                Cons

                • Too Hard

                Best Uses

                • Primary Bed

                Comments about Amerisleep AS4:

                I don't recommend this bed for side sleepers. I didn't return it before the 100 nights because I wanted to give the bed a chance to soften up. Unfortunately, the bed never softened enough for a comfortable night sleep on my side. I often wake up to pins and needles in the arm of the side I'm sleeping on. I'm also noticing bruising in my elbow joint where the circulation is getting cut off during the night.

                 
                5.0

                The Search is Finally Over

                By 

                from Gilbert, AZ

                About Me Midrange Shopper

                Verified Buyer

                Pros

                • Comfortable
                • Good Support
                • Holds Shape
                • Soft Feel

                Cons

                • Sleeps Warm

                Best Uses

                • Guest Bed
                • Primary Bed

                Comments about Amerisleep AS4:

                My husband and I bought and returned three King mattresses in the past year: two Sealys and one T&N. The traditional spring mattresses were both plush top and supposedly firm; both developed deep channels where my husband and I sleep within the first couple of weeks, negating any purported plushness. We received refunds for both. After reading reviews for T&N and, admittedly, succumbing to their marketing strategy, we ordered their mattress. Their customer service is great, but the mattress was as good as the floor next to my bed. It also went back.

                I was skeptical going into Amerisleep, having just tried and returned a memory foam mattress, but in we went. Thankfully, Amerisleep mattresses really are different! They have the firmness you'd expect from a foam mattress, but they also deliver on plushness! The top layer of the bed feels like a marshmallow, and one's body sinks into a firm second layer. You guys, it's the perfect marriage of plush and firm! Also a huge bonus - the mattress cover unzips, making it super easy to wash the top half. PURE GENIUS! The only drawback is the same for any foam mattress - they tend to sleep warm when occupied. This one is no different, but we kick up the AC at night and it is worth it for the overall comfort and quality of the bed.

                We've been sleeping on the A4 for more than a month now, and there are no indentations whatsoever and it's still in perfect shape. We are happy and rested for the first time in years! We highly recommend this mattress!

                Service and delivery comments:

                Delivery as expected.

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                *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.