Mattress Review Amerisleep AS4 Mattress

Amerisleep has done it again. You know they are dedicated to your best sleep when they give you 5 comfort options. Each option uses the latest technology and the best materials to create an ideal feel and support. The Amerisleep AS4 is their medium-soft feel and is the second most popular side sleeper mattress. It is perfect for sleepers who want just a little bit extra plush and comfort. Continue reading for a review of this incredibly comfortable mattress.

Amerisleep AS4 Mattress Coupon

Amerisleep AS4 Mattress – Brief Overview:

amerisleep as4 mattress reviewThe AS4 is a versatile and ideal mattress for anyone who likes a plusher feel. They created it’s medium-soft feel by layers of foam that are responsive, but supportive, to make you feel like you are sleeping on a cloud. This 12” mattress relieves pressure points and keeps you cool giving you a comfortable sleep guaranteed.

The AS4 combines three layers of foam to make up the 12″ bed. The top layer is the proprietary Bio-PUR foam, with advanced open-cell structure to keep you cool. The middle layer is the proprietary Affinity layer with Surface Modification Technology. It provides extra pressure in certain “zones” that need it, such as your neck and shoulders. The third layer is the proprietary Bio-Core foam support layer. This transition and support layer will keep you sleeping sound for years to come.

Tested. Guaranteed. Approved. Amerisleep is confident you’ll love the AS4. Additionally you’ll sleep well knowing their products are eco-friendly, replacing more of the petroleum-based materials with plant-based ones. Amerisleep is proud to say their manufacturing method is the only one that exceeds the Clean Air Act. If that doesn’t sound like the most guilt-free sleep yet, don’t forget you have a 100-night trial to see for yourself.

Amerisleep – Brief Overview:

Amerisleep gives you the best of both worlds. They are dedicated to your sleep and dedicated to giving you excellent customer service. Their USA made mattresses ship for free and offer free returns. All Amerisleep mattresses feature a 100-night sleep trial and 20 year warranty, so you know you’re buying from a company that stands behind their product. The AS4 is comfort on a cloud, but still supportive. It is ideal for many sleepers, especially side sleepers. Or if you just like that ‘ahh’ feeling when you get into bed.

Below you will find our Amerisleep AS4 review. It will give you a detailed idea of what to expect while you make your purchase online. It will include overall comfort, delivery and off-gassing, motion transfer, edge support, sleeping cool- you know, all the important stuff. We’re sure after you read our guide, you’ll be just as confident buying this mattress as you would in a store.

Delivery & Off-Gassing:

amerisleep as4 mattress reviewLike all other Amerisleep mattresses, the AS4 is shipped for free. The mattress is made right here in the US, compressed, rolled up, and then fit into a compact box. Your AS4 should arrive within a week via FedEx. The white and blue box will be the dreamiest thing that has ever arrived at your door.

The first thing you will want to do is to get the mattress to its desired location. Then, remove it from the box, set it on its base, and cut away the plastic. The initial expansion will only take a few minutes, but you will need to allow 24-48 hours before your mattress has firmed up to its true feel. This means you may not want to sleep on it the first night, or at least don’t expect it to be at its 100% firmness level yet.

Most boxed mattresses will have a unique smell, but you can just consider this the ‘new’ mattress smell because any fumes that are present are non-toxic and harmless. Since the AS4 is made in the US and Amerisleep strives to use more environmentally friendly materials, you know there won’t be any noxious fumes. If you’re sensitive to new smells or don’t prefer it, simply open a window and let the mattress air out while it is expanding. This will be perfect timing for both to occur and you don’t have to stay in the same room, so you can avoid the smell.

Amerisleep AS4 Mattress – Comfort:

amerisleep as4 mattress reviewThere is a reason the AS4 is one of the most popular choices of the Amerisleep brand. The medium-soft feel is the perfect blend of plush and support, so once you’re in bed, you’re in bed and surrounded by comfort. This mattress is ideal for a variety of sleepers, but especially side sleepers, couples with a softer comfort preference, and those who like a little extra softness to their mattress.

The AS4 perfectly relieves pressure points, but it’s the fast response time that is top-notch. The unique foams used by Amerisleep promise to recover their shape faster than traditional memory foams. Most memory foams take about 60 seconds to bounce back, but the Amerisleep foams take only 4 seconds. That means you can get comfier faster, the mattress conforms to you faster, and you feel less “stuck”.

Not to mention the Affinity layer makes you feel like you’re floating, so you’re truly never stuck. With the Bio-Core foundation layer, you’ll never float away and still get all the support you need thanks to this dense, firm layer. The added bonus with the AS4 is its medium-soft, so you get just a little extra softness for comfort. And there’s no such thing as too much comfort!

Amerisleep AS4 Mattress Coupon

Amerisleep AS4 Mattress – Motion Transfer:

amerisleep as4 mattress reviewThe AS4 by Amerisleep will have little to no motion transfer, which means you and your partner can sleep peacefully. Memory foam mattresses, such as those by Amerisleep are ideal for couples because they absorb almost all vibrations. With the Amerisleep you know you get the added absorption with their fast responding foam. Customers rave that both themselves and their partners get their best sleep ever, so you know there is no sleep disturbance. If memory foams are #1 for limited motion transfer, the Amerisleep including the AS4 is the #1 of all memory foams.

Amerisleep AS4 Mattress – Sleeping Cool:

When you think of memory foam, sleeping cool is not the first thing that comes to mind. But with the AS4 by Amerisleep your sure to notice a difference. Amerisleep has put just as much innovation and technology into creating a temperature neutral mattress, as they have the quality. From the moment you lay in bed to the moment you step out of it, the AS4 by Amerisleep will have you sleeping cooler than you expected.

amerisleep as4 mattress reviewFrom top to bottom, the AS4 has qualities to keep you cool. At the very top, the part closest to your body is the mattress cover. Amerisleep is licensed to use Celiant in their mattress covers; an advanced fabric that turns your body heat into infrared. Directly beneath the cover, the top layer uses an “open cell structure” that is unlike typical memory foams. Typical memory foams use particles that are densely packed and close together. They created the AS4 and Amerisleep foams with more space for air flow. This also helps wick away heat, keeping you cooler and more comfortable

Finally, the Bio-Core foam is made with strict, “no-sag” guidelines. This means that the less you sink into the bed, the more air is able to flow around you. Keep in mind that with the AS4, the core support will decrease the “sink”, but the added plushness for the medium-soft feel may alter it slightly. Regardless, you’ll be able to tell the difference with the AS4 compared to sleeping cool on memory foams, and you have 100 nights to try it out.

Amerisleep AS4 Mattress – Edge Support:

amerisleep as4 mattress reviewThe AS4 gives you 12” of thick, solid, high-quality foams. Even with the added softness, you will still get a mattress that is supportive and consistent throughout. Like most memory foams, this means you should be able to sleep up to the very edge without feeling like you are going to roll out. And since the Amerisleep is top-notch, you know you’re getting quality foam when it comes to edge support.

Although a mattress is more for sleeping than for sitting, we all know there is a time when you need to sit on the edge on occasion. While the AS4 will feel more supportive than other brands, you will still leave an indent in the foam where you sit. Continuing to sit in the same spot over prolonged periods of time will also break down the sides of the bed. If you want to maintain the longevity of the AS4 we recommend to keep sitting on the edge at a minimum.

Amerisleep AS4 Mattress – Value:

A mattress is a long-term investment, so you want to know you’re getting quality that’s also going to last long-term. With the Amerisleep, you can be assured that you’re getting the best value for your money because of the high quality, patented materials, and durability. The AS4 ranges from $1399 to $1899 for a King. A Queen size is right in the middle at $1699. And remember, you’re paying for quality that will last, a one-time payment for 10+ years. If you act now, you’ll also receive their $200 coupon, making this price even prettier.

The best part is, that’s the only thing you’ll pay for. Shipping is free right to your door and you’ll also receive a 100-night trial and 20-year warranty. Finally, you can also be satisfied that you’re getting a good value when you know that Amerisleep uses more environmentally friendly methods and materials, and what can be more valuable than that?

Amerisleep AS4 Mattress Coupon

Materials & Construction:

amerisleep as4 mattress reviewThe 12” AS4 Amerisleep mattress is made up of 3 layers and a breathable cover to pull it all together. The first layer is the extra breathable cooling layer,  4” of Bio-PUR foam. This layer is 5x more breathable than traditional memory foam, thanks to its open cell structure.

Beneath that is the “feels-like-you’re-floating”, 1” layer of Affinity foam. This amazing transition layer uses Surface Modification Technology and is made of their ergonomic transition foam. The “zones” in this layer provide extra relief to those important areas, such as the shoulders and lower back. The transition layer is so smooth between the top and base layers that you’ll truly feel like you’re sleeping on a cloud.

Finally, the sag-free and eco-friendly layer is 7” of Bio-Core support foam. They designed this foam to prevent sag even after decades of use. The only way to know for sure? Purchase it and you’ll see. The best part is that all layers are more eco-friendly, which means they use less petroleum-based materials and more plant-based ones. They also wrapped the whole mattress in their extra breathable Celiant cover, which is a rare fabric that not many brands use.

Trial Period & Warranty:

As mentioned above, you get 100 nights to test the AS4 and a 20 year warranty. Both of these values are Amerisleep’s promise to giving you your best night’s sleep. Four months is more than enough time to decide if the AS4 is the best fit for you. We recommend however that you at least give yourself 30 days to try it before you return it. This allows enough time for the foams to settler and for you to get a true feel of the mattress. After that, if you’re still not satisfied, Amerisleep will help you make a fast and easy return.

Remember, the first 10 years of the warranty are completely covered, but after that it is prorated to coincide with the natural wear and tear of the mattress. Still, with 20 years being longer than most, you know you’re buying from a company that stands behind their product.

If you are looking for more specifics for the Amerisleep trial period & warranty find out more HERE. Or for a helpful tool check out Our Mattress Warranty & Trial Period Guide.

Amerisleep AS4 Mattress – Customer Feedback:

Here are some of the great things that customers like you have said about the AS4:

“I’m getting the best sleep ever! My Fitbit tracker shows my awake and restless times were cut in half.” – JM

“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.” – Kookie

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

Also, remember Our Sleep Guide is here to help and make sure you find the best mattress for you! If you have questions or need more insight during your mattress buying journey, please feel free to contact us

Amerisleep AS4 Mattress Rating
  • Delivery & Unboxing
  • Comfort
  • Motion Transfer
  • Sleeping Cool
  • Edge Support
  • Value
  • Materials & Construction
  • Trial Period
  • Warranty

Manufacturer Promises

  • Shipping Free Shipping
  • Trial Period 100 Night Sleep Trial
  • Warranty 20 Year Warranty

Current Pricing

  • Twin $1399
  • Twin XL $1449
  • Full $1549
  • Queen $1699
  • King $1899
  • Cal King $1899
Overall Rating


The Amerisleep AS4 Mattress Mattress might be good for you if…

  • You want a medium-soft memory foam mattress that releivs pressure but doesn't make you feel stuck.
  • You want a thick and durable bed that is supportive and uses technology dirven foams that are superior in quality as well as more heathy.
  • You want an all foam mattress that provides ample benefits and great sleeping qualities.
  • You want a well priced mattress from a company with a solid reputation and generous warranty.

Still looking for some more information? Visit Amerisleep at Amerisleep.com. Also, have questions for us? Please contact us and we would be happy to help you!

Also, remember Our Sleep Guide is here to help and make sure you find the best mattress for you! Contact Us. We would love to help you in any way we can.