updated August 2022

Casper v. Amerisleep Mattress Comparison

Casper v. Amerisleep Mattress Comparison

In this Casper vs Amerisleep comparison, we help you decide which mattress is the best for your sleep needs.

So you’re comparing the Casper and Amerisleep memory foam mattresses? Good choices. Both of these mattress models are all-foam beds made with high-quality materials and unique comfort technologies. But which is right for you? That’s what we’ll talk about in this mattress comparison.

Learn about how bed-in-a-box companies Casper and Amerisleep differ in this review that takes a closer look at the Casper Original and Amerisleep AS3 mattresses.


Highlights and An Overview

Customer Rating
MA Score
Summary
Firmness
Type
Trial Period
Warranty
Customer Rating
MA Score

8.7/10

Summary

Universal firmness mattress for the average sleeper

Firmness

Medium-firm: 6/10

Type

Memory foam

Trial Period

100 days

Warranty

10-year limited warranty

amerisleep as3 1

Amerisleep AS3

Customer Rating
MA Score

8.4/10

Summary

Memory foam mattress with cooling technology (part of Amerisleep's Soft Collection)

Firmness

Medium: 6/10

Type

Memory foam

Trial Period

100 days

Warranty

20-year limited warranty

casper original hero
amerisleep as3 1

Casper

Amerisleep AS3

Customer Rating

MA Score

8.7/10

8.4/10

Summary

Universal firmness mattress for the average sleeper

Memory foam mattress with cooling technology (part of Amerisleep's Soft Collection)

Firmness

Medium-firm: 6/10

Medium: 6/10

Type

Memory foam

Memory foam

Trial Period

100 days

100 days

Warranty

10-year limited warranty

20-year limited warranty

Key Similarities

  • The Casper and Amerisleep AS3 are all-foam beds with memory foam layers and cooling features.
  • Both are medium-firm mattresses, which is the ideal firmness option for the average sleeper or for shoppers who want a mattress with broad appeal.
  • You get 100 days to try both of these mattresses.
  • Both beds scored well when tested for spinal alignment and motion transfer.

Key Differences

  • Casper gives you a 10-year limited warranty, while Amerisleep gives you double that with a 20-year limited warranty.
  • Casper is more budget-conscious than Amerisleep, costing about $100 less for a queen-size mattress.
  • Casper scored higher for pressure relief and edge support, while Amerisleep received better scores for cooling and durability.
casper 1

Casper Mattress Review Highlights

  • Targeted Support: Casper’s comfort layer features Zoned Support™. That’s their trademarked way of saying that you’ll experience the right amount of firmness for each region of your body.
  • Top-Rated for Side Sleepers: The Casper mattress is a tested and true top pick for side sleepers. It scored remarkably high for pressure relief and spinal alignment, both of which are important categories for side sleepers.
  • Responsive: Casper is also a slam dunk for combo sleepers. It scored 10/10 in our responsiveness assessment, making it easy to move around at night.
  • Broad Appeal: Mattresses with a medium to medium-firm feel are comfortable for most sleeping positions. Casper is 6/10, or medium-firm, on the firmness scale, which has a comfy blend of contouring and support for back sleepers, stomach sleepers, and side sleepers alike. 
  • Breathable: Casper designers wanted a cooler mattress than traditional memory foam, so they added tiny holes in the foam to allow your body heat to flow away.
  • You can also see if the Casper Element, Casper Hybrid, Casper Nova Hybrid, Casper Wave Hybrid , or Casper Wave Hybrid Snow may be better for you.
amerisleep as3 1

Amerisleep Mattress Review Highlights

  • Motion Transfer: The foam layers absorb motion from movement before they affect the rest of the mattress surface. This is a feature that couples look for since motion isolation reduces sleep disruptions.
  • Cooling: The AS3 mattress features Amerisleep’s Bio-Pur® material, which is designed to keep you cool with an open-cell structure. 
  • Eco-Friendly: The Bio-Pur memory foam is made with renewable plant-based oils and way fewer petrochemicals than traditional memory foam. It’s also CertiPUR-US® certified, which is better for your family and the planet because there is less off-gassing in the environment and your home. 
  • HIVE Technology: The AS3 transition layer is constructed with Amerisleep’s HIVE technology, which keeps your spine aligned, reduces stress on pressure points, and creates a sleeping-on-clouds feel.
  • 20-Year Warranty: You have two decades with your Amerisleep mattress before it’s out of warranty, while most mattresses’ peak performance years happen in the first decade.
  • For various firmness levels, check out the AS1, AS2, AS4, AS5, and Amerisleep Organica.

Mattress Sizes

Casper and Amerisleep have almost identical dimensions, but Amerisleep’s Full is 1” wider.

Casper
Amerisleep
Thickness 11″ 12″
Twin Size 38″ x 75″ 38″ x 74″
Twin XL 38″ x 80″ 38″ x 80″
Full Size 53″ x 75″ 54″ x 75″
Queen Size 60″ x 80″ 60″ x 80″
King Size 76″ x 80″ 76″ x 80″
Cal King Size 72″ x 84″ 72″ x 84″
Split King N/A 38″ x 80″ (x2)

Learn more about mattress sizes.


Mattress Prices

Casper and Amerisleep are both budget-friendly mattresses. Compare both brands’ prices by size below.

Casper
Amerisleep
Twin $895 $1,149
Twin XL $995 $1,199
Full $1,195 $1,349
Queen $1,295 $1,399
King $1,695 $1,699
Cal King $1,695 $1,699
Split King N/A $2,098

 


Compare What’s Inside

These two different memory foam mattresses actually have a lot in common. Take a look inside to see how the all-foam layers stack up.

inside casper original

Inside The Casper Mattress

  1. Soft Cover: Casper makes their soft polyester cover from up to 57 recycled bottles. 
  2. Airscape™ Foam: This is the softest layer on the Casper mattress. It’s made of polyfoam, which is a little lighter than memory foam. It’s also perforated, which creates channels for warm air to travel away from your body. 
  3. Memory Foam Layer: Casper’s middle foam layer is composed of Zoned Support™ memory foam. The foam under your shoulders is softer, while the foam under your hips is firmer. These ergonomic zones help to keep your spine in its natural alignment, which can prevent or alleviate back pain.
  4. Durable Base: At the base of the mattress is a thick foam layer. It’s a bit firmer, so it keeps you from sinking too far into the mattress. It also prevents sagging.

 

inside amerisleep as3

Inside the Amerisleep Mattress

  1. Refresh Cooling Cover: Made with fiber that transfers energy away from the body, this cover keeps you cooler than traditional mattress covers.
  2. Bio-Pur Foam: Amerisleep’s proprietary Bio-Pur foam is eco-friendly and breathable. It has an open-cell structure that improves air circulation under your body.
  3. Affinity Transition Foam: This foam layer is designed with targeted ergonomic support that enhances spinal alignment and eases stress on pressure points.
  4. Support Layer: The polyurethane foam base is 7” thick. It serves as a durable, supportive foundation for the whole mattress.

Compare Our Scores

We put both the Casper and Amerisleep AS3 mattresses through a comprehensive lab evaluation that tests 14 important criteria. The chart below shows how each mattress scored across all the categories.

Casper Amerisleep
Shipping 10 8
Trial Period 9 9
Return Policy 10 10
Warranty 9 10
Set-Up Test 8 9.5
Motion Transfer Test 8 8.75
Edge Support Test 9.5 8
Pressure Relief Test 8.5 7.75
Spinal Alignment Test 9.5 8.25
Responsiveness Test 10 7
Cooling Evaluation 7 8
Durability Evaluation 8 8.5
Customer Service Score 9 9
Social Impact Score 9 4
TOTAL SCORE 9.1/10 8.4/10

Cooling

The Amerisleep scored a full point more in our cooling evaluation, making it the clear choice for hot sleepers. We credit this higher score to the Amerisleep AS3’s Refresh Cover, which transforms body heat into infrared energy. The mattress also uses Bio-Pur material, which promotes airflow thanks to its open-cell design.

Sleeping Position

Mattress firmness can make a huge impact on comfort. Fortunately, Casper and Amerisleep both have a medium-firm feel that works for all sleep positions. 

Still, side sleepers will be more comfortable on the Casper. It scored higher in pressure relief and spinal alignment. Back and stomach sleepers could fare well on either bed, although Casper’s superior spinal alignment is a big plus if you have back pain.

Combo sleepers should go with Casper, since it scored a perfect 10/10 on our responsiveness assessment. Amerisleep only scored 7/10, which isn’t bad, but doesn’t compete with Casper’s perfect score.

Sleep Trial Period and Warranty

You may pay more for the Amerisleep, but you are protected for longer. Amerisleep’s 20-year warranty is two times longer than Casper’s warranty. It also covers more nuanced defects. For example, Amerisleep will completely replace your mattress if it develops sagging deeper than 0.75”, while Casper only covers 1” impressions. Keep in mind that Amerisleep requires you to pay a prorated cost during the second 10 years of the warranty. 

Both companies provide free shipping in the continental U.S. They also both offer 100-night sleep trials and full refunds during the trial period.

Is Casper or Amerisleep the Best Mattress?

You may already have a good idea of which mattress is the right fit for your needs. Whichever mattress you choose, we’re confident you’ll experience a comfy night’s sleep. Each of these mattress models received rave reviews from customers and neither scored below average on any of our evaluation criteria. Plus, if your new mattress is just not the right fit, you can return it during the 100-day trial period.

Keep reading to see which mattress best matches your personal sleeping position, sleeping environment, budget, and ideal customer expereince.

Sleeping Position

Buying a mattress that is compatible with your sleeping position can help ensure you get a good night’s sleep. While the Casper mattress works for all sleeping positions, the Amerisleep AS3 didn’t perform well for combination sleepers since it scored average for responsiveness. If you’re a combination sleeper, go with the Casper. Stomach, side, and back sleepers should do well with either mattress.

Sleep Environment

Do you sleep hot? Picking a cooling mattress can help you keep an ideal temperature at night. Both the Casper and Amerisleep AS3 are all-foam mattresses, which tend to trap heat and not score well in our cooling tests. The Casper earned an average 7/10, while the Amerisleep AS3 was one point higher thanks to its Refresh cover.

If you sleep with a partner or pet, pay close attention to how a mattress does in our motion isolation test. This lets you know whether you’ll wake up from your partner moving around. Both mattresses scored above average in this category and would be great option for co-sleepers.

Budget

When picking between mattresses, it’s important to consider which one’s in your budget. Of the two, Casper is the more affordable option. A queen-size Casper mattress costs just over $100 less than a queen-size Amerisleep AS3. Since the price difference isn’t major, it’s helpful to consider other factors as well. Plus, both companies offer financing and have regular mattress sales.

Customer Service

Finally, as you decide between the Casper and Amerisleep AS3 mattress, think about what the buying experience is like. Both companies offer 100-night sleep trials to give you time to test out their mattresses. Amerisleep offers a longer warranty which may be helpful if you plan on keeping your mattress for a while. Whichever you decide, you can count on free shipping and returns.

Other Casper Comparisons

best budget mattress

Still Deciding?

Ready to compare other mattresses against each other? Use our comparison tool to see how two different mattress models compare.