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Casper vs. Amerisleep Mattress Comparison

Written by - Amelia Willson.

The Bottom Line.

  • The Casper Original is a memory foam mattress that offers a ‘Medium’ feel and targeted pressure relief for sleepers with back pain.
  • The AS3 from Amerisleep is another memory foam model designed with a Celliant cover for exceptional temperature neutrality.
  • Both beds excel at body conforming and motion isolation.

4,681 Verified Customer Experiences

66 Unique Review Sources

104 Hours of Lab Testing

4 Sleep Experts Consulted

Meet Our Testing Team
Amelia
Amelia
Isaac
Isaac
Jackson
Jackson
Rachel
Rachel

Casper vs. Amerisleep Mattress Overview

Casper launched in 2014. The brand’s flagship bed, the Casper, is made with a triple-layer polyfoam and memory foam comfort system, as well as a high-density polyfoam base layer. The mattress is considered ‘Medium’ in terms of firmness, or a 5.5 on the 1-10 firmness scale.

Amerisleep has been in business since 2007. The AS3 (formerly known as the Liberty) is included in the brand’s current line of memory foam mattresses. This model has a memory foam comfort layer, a dual-layer polyfoam support core, and a cover made of Celliant fabric, polyester, and spandex. The AS3 is considered ‘Medium’ (5.5) in terms of firmness.

Please note: Both Casper and Amerisleep offer other mattresses in addition to the models listed above:

  • Casper sells four other beds. These include the Casper Essential, a memory foam mattress; the Casper Wave, a memory foam and latex mattress; and the Casper Hybrid and Casper Wave Hybrid, both of which feature memory foam comfort layers and pocketed coils.
  • Amerisleep offers four other memory foam mattresses, each with a different firmness: the AS1 (7.5), AS2 (6.5), AS4 (4.5), and AS5 (3.5).

This page will exclusively compare the Casper and AS3 mattresses. For more information about other beds from these brands, please visit our Casper Mattress Reviews and Amerisleep Mattress Reviews pages.

The Casper and AS3 mattresses share the same ‘Medium’ (5.5) firmness, as well as other attributes including close body conforming and above-average motion isolation. However, they also differ in terms of other factors such as price-point and temperature neutrality. This guide will compare the unique pros and cons of each mattress, as well as the individual policies and overall reputations of both companies.

Casper

AS3

MATTRESS TYPE FoamFoam
FIRMNESS 5.55.5
PRICE RANGE $995.001,199.00
AVAILABILITY online, in-storeonline, in-store
SLEEP TRIAL 100 nights100 nights
WARRANTY LENGTH 10 Year, Limited20 Year - 1st 10 Year unlimited, 2nd 10 Year pro-rated
Tap here to see more mattress stats

Ratings Comparison

  • Casper
  • AS3

Full Sleep Rating

Criteria
Rating
Durability
Motion Isolation
Off-gassing
Conforming
Sex
Temperature Neutrality
Edge Support
Noise

Full Sleep Rating

Criteria
Rating
Durability
Motion Isolation
Off-gassing
Conforming
Sex
Temperature Neutrality
Edge Support
Noise
  • Casper
  • AS3
Durability
Motion Isolation
Off-gassing
Conforming
Sex
Temperature Neutrality
Edge Support
Noise
Durability
Motion Isolation
Off-gassing
Conforming
Sex
Temperature Neutrality
Edge Support
Noise
hand

Durability

Owners report that Casper models perform fairly well after long-term use, but the company has only been in business for three years and it may be too early to accurate gauge the lifespan of these mattresses.

Durability

Owners report that Casper models perform fairly well after long-term use, but the company has only been in business for three years and it may be too early to accurate gauge the lifespan of these mattresses.

Motion Isolation

The Casper mattress absorbs and minimizes motion to a significant extent, according to owners.

Motion Isolation

The Casper mattress absorbs and minimizes motion to a significant extent, according to owners.

Off-gassing

Some Casper owners report moderate off-gassing when the mattress is new.

Off-gassing

Some Casper owners report moderate off-gassing when the mattress is new.

Conforming

The Casper offers comfortable conforming and targeted pressure relief.

Conforming

The Casper offers comfortable conforming and targeted pressure relief.

Sex

Our testing indicates that The Casper isn't particularly responsive or bouncy given it's construction so is just ok for sex which is on par with most mixed foam mattresses.

Sex

Our testing indicates that The Casper isn't particularly responsive or bouncy given it's construction so is just ok for sex which is on par with most mixed foam mattresses.

Temperature Neutrality

Casper mattresses absorb minimal body heat and sleep fairly cool compared to other memory foam mattresses.

Temperature Neutrality

Casper mattresses absorb minimal body heat and sleep fairly cool compared to other memory foam mattresses.

Edge Support

The Casper offers minimal edge support and sinkage aorund the perimeter is likely over time.

Edge Support

The Casper offers minimal edge support and sinkage aorund the perimeter is likely over time.

Noise

Casper mattresses are virtually silent when bearing weight.

Noise

Casper mattresses are virtually silent when bearing weight.

hand

Durability

Amerisleep AS3 mattresses tend to degrade faster than average for the memory foam mattress type.

Durability

Amerisleep AS3 mattresses tend to degrade faster than average for the memory foam mattress type.

Motion Isolation

AS3 mattresses absorb and minimize motion transfer to a significant extent.

Motion Isolation

AS3 mattresses absorb and minimize motion transfer to a significant extent.

Off-gassing

Minor off-gassing odors have been reported for AS3 mattresses, but these smells usually dissipate quickly.

Off-gassing

Minor off-gassing odors have been reported for AS3 mattresses, but these smells usually dissipate quickly.

Conforming

The AS3 is less firm and conforms quite closely for targeted pain and pressure relief.

Conforming

The AS3 is less firm and conforms quite closely for targeted pain and pressure relief.

Sex

The AS3 is softer and not very bouncy, and may not be responsive enough for couples.

Sex

The AS3 is softer and not very bouncy, and may not be responsive enough for couples.

Temperature Neutrality

AS3 mattresses have covers blended with celliant fabric that allows the bed to sleep relatively cool for most.

Temperature Neutrality

AS3 mattresses have covers blended with celliant fabric that allows the bed to sleep relatively cool for most.

Edge Support

The AS3 offers stronger edge support than many of its all-foam competitors, due in part to its thick polyfoam support core.

Edge Support

The AS3 offers stronger edge support than many of its all-foam competitors, due in part to its thick polyfoam support core.

Noise

AS3 mattresses are virtually silent when bearing weight.

Noise

AS3 mattresses are virtually silent when bearing weight.

The Casper Mattress Is Great for...
  • Sleepers who prefer a ‘Medium’ mattress that provides close conforming
  • Those who frequently experience pain and pressure in their lower back and other sensitive areas
  • Couples
The Amerisleep AS3 Is Great for...
  • Sleepers who prefer ‘Medium’ firmness
  • Those needing pressure relief when side-sleeping, but with strong support to keep your spine aligned
  • People who normally sleep hot on all-foam beds

Sleep Position Ratings

Casper Sleeper Ratings

The Casper is considered ‘Medium’ (5.5) in terms of firmness. This feel is optimal for sleepers in the average weight group (130 to 230 pounds), and may also provide adequate conforming for lighter individuals. The mattress also isolates motion transfer very well and produces no noise when bearing weight, making it a good option for couples.

Amerisleep AS3 Sleeper Ratings

Like the Casper, the AS3 offers ‘Medium’ (5.5) firmness that balances body conforming and sleeper support. This setting is optimal for people who weigh between 130 and 230 pounds, and may also be suitable for lighter individuals; its thicker profile may be suitable for heavier people, as well. Edge support is another key strength; the AS3 is less susceptible to sinkage around the perimeter than many of its all-foam competitors. Other advantages include good motion isolation, no noise, and relatively cool sleep due to the Celliant-blended cover.

  • Casper
  • AS3
Weight Light Average Heavy
Sleep Position Less than 130 LBS 130 LBS - 230 LBS Greater than 230 LBS
Side
Back
Stomach
Weight Light Average Heavy
Sleep Position Less than 130 LBS 130 LBS - 230 LBS Greater than 230 LBS
Side
Back
Stomach

Our Recommendations

Choose the Casper if...

  • You want a mattress with ‘Medium’ firmness that conforms somewhat closely
  • You prefer low-profile beds
  • You and/or your sleep partner awaken easily due to noise or movement
  • You weigh 230 pounds or less

Choose the Amerisleep AS3 if...

  • You want a mattress with ‘Medium’ firmness that conforms somewhat closely
  • You usually sleep hot on all-foam beds
  • You prefer higher-profile beds
  • You weigh 230 pounds or less

Technical Details Comparison

Sizing and Pricing

  • twin-bed
    Twin $595 The Casper $1,099 AS3
  • twin-bed
    Twin XL $645 The Casper $1,149 AS3
  • twin-bed
    Full $895 The Casper $1,249 AS3
  • twin-bed
    Queen $995 The Casper $1,399 AS3
  • twin-bed
    King $1,195 The Casper $1,699 AS3
  • twin-bed
    Cal King $1,195 The Casper $1,699 AS3

Mattress Constuction

Now let’s see how the Casper and AS3 are made. The next table lists firmness, thickness, weight, and composition specs for both mattresses.

Specification Casper Amerisleep AS3
Firmness 5.5 (Medium) 5.5 (Medium)
Thickness 9 1/2″ 12″
Weight (Queen) 71 lbs. 88 lbs.
Support Core Components 5″ 1.8 PCF HD Polyfoam 2″ 1.65 PCF Polyfoam
7″ 1.8 PCF HD Polyfoam
Comfort Layer Components 1 1/2″ Polyfoam
1 1/2″ 4 PCF Memory Foam
1 1/2″ 2 PCF Polyfoam
3″ 4 PCF Memory Foam
Cover Composition 100% Polyester 77% Polyester
21% Celliant Fabric
2% Spandex

How Is the Casper Built?

The Casper has three comfort layers – top and bottom polyfoam layers with a middle memory foam layer – that create a ‘Medium’ feel that provides close body conforming. Its single-layer support core is constructed from high-density polyfoam. This layer reinforces the bed and helps maintain an even sleep surface. The mattress has a 9 1/2″ thickness profile, which is slightly shorter than average.

A Queen-size Casper mattress weighs roughly 71 pounds. This is exceptionally light even by all-foam mattress standards, making the bed relatively easy to lift and rotate as recommended.

How Is the Amerisleep AS3 Built?

The AS3 is a memory foam mattress with a 3″ comfort layer of 4 PCF foam. This material conforms closely with ‘Medium’ firmness. The bed’s cover is made of polyester blended with Celliant fabric, which helps the mattress absorb less body heat from sleepers and feel relatively cool as a result.

The AS3 has a thick support core consisting of a 2″ transitional polyfoam layer and a 7″ high-density polyfoam base. These layers reinforce the bed very well, helping to maintain a flat, even surface and help the mattress withstand sinkage around the edges better than other all-foam models. A Queen-size AS3 weighs 88 pounds, which is slightly heavier than average, making the bed somewhat difficult to lift and rotate compared to the average all-foam mattress.

Casper Sleep Trial, Warranty, and Delivery

  • Sleep Trial 100 nights

  • Shipping Anywhere in the U.S. and Canada

  • Warranty 10 years, nonprorated

  • Made In USA

  • Trial Period Details

    Casper offers a 100-night sleep trial for the Casper mattress.

    1. This sleep trial does not require a break-in period. Customers may return the mattress for a full refund at any point of the 100-night trial.
    2. In the event of a return, Casper will coordinate the removal of the mattress from the customer’s residence.
    3. Full refunds are provided for all returns if the mattress is ordered from Casper. Those who buy their mattress from Amazon.com and other third-party retailers may need to pay additional fees.
    4. Exchanges are offered during the 100-night trial. Exchanging for different mattress sizes or colors of the same mattress will void the remaining sleep trial; exchanging for a different Casper mattress model will necessitate a new 100-night trial.
  • Warranty Details

    Casper offers a 10-year nonprorated warranty:

    1. This warranty is entirely nonprorated.
    2. The warranty will be voided if the mattress is not used with a firm, supportive foundation.
    3. Casper covers all shipping costs related to repairing or replacing a defective mattress.
    4. The warranty will cover the following defects:
      • Sagging or indentations in the sleep surface measuring 1″ or deeper.
      • Physical flaws that cause mattress materials to split or crack.
      • Cover zipper defects.
    5. The warranty will not cover the following:
      • Sagging or indentations in the sleep surface measuring less than 1″ deep.
      • Burns, cuts, tears, stains, and other forms of physical damage resulting from misuse.
      • Repair or replacement requests that occur due to changes in the owner’s comfort preferences.
    6. This warranty is non-transferable. It is only available to original owners who purchase the mattress from Casper or an authorized retailer. Those who buy or acquire the mattress from the original owner or non-authorized sellers will not qualify for warranty coverage.
  • Delivery Details

    The delivery policy for Casper mattresses is as follows:

    1. Most customers receive their mattress within two to seven business days after placing their order.
    2. In addition to standard UPS delivery, which is free of charge, Casper offers White Glove delivery – including in-home mattress assembly – for a flat rate of $149.

    How Is the Mattress Shipped?: Compressed and shipped in a box.
    Where Do They Ship?: Anywhere in the U.S. and Canada.
    Delivery Fee: Standard delivery is free of charge, while in-home assembly is $149.

    Old Mattress Removal

    Old mattress removal is available for those who select in-home assembly; there is no extra charge beyond the $149 flat fee. Old mattress removal is not offered with standard deliveries.

Casper Coupons and Discounts

Get $100 off The Casper Mattress as a Tuck reader.

from Tuck by using the code: TUCK. Check Lowest Price by clicking the link below. The discount will be automatically applied!

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Amerisleep Sleep Trial, Warranty, and Delivery

  • Sleep Trial 100 nights

  • Shipping All 50 states and Canada

  • Warranty 20 years, partially prorated

  • Made In USA

  • Trial Period Details

    Trial Period and Guarantee

    Amerisleep offers a 100-night sleep trial for the AS3 mattress.

    1. This sleep trial includes a mandatory 30-night break-in period. Full refunds will not be issued until the customer tests out the mattress for at least 30 nights.
    2. In the event of a mattress return, Amerisleep issues a full refund and arranges for the mattress to be picked up from the customer’s residence at no extra cost.
    3. This sleep trial is extended to customers who purchase their Amerisleep AS3 mattress on Amazon.com.
  • Warranty Details

    Warranty

    Amerisleep offers a 20-year warranty for the AS3:

    1. This warranty is partially prorated. During the first 10 years of ownership, Amerisleep will repair or replace mattresses with defects at no extra charge to the owner. During years 11 to 20, Amerisleep will replace defective mattresses for 50% of the original product price; owners are also responsible for mattress shipping and transportation costs during this prorated period.
    2. The warranty will be voided if the mattress is not used with a solid wood, non-spring, completely flat foundation or bed platform. Additionally, box springs must be used with at least three-quarters of an inch (3/4″) of plywood, and bases cannot have slats that are more than three inches (3″) apart.
    3. The warranty will cover the following defects:
      • Sagging or indentations in the sleep surface measuring three-quarters of an inch (3/4″) or deeper.
    4. The warranty will not cover the following:
      • Sagging or indentations in the sleep surface that do not measure three-quarters of an inch (3/4″) or deeper.
      • Burns, cuts, tears, stains, and other types of physical damage that occur due to misuse or neglect.
    5. This warranty is non-transferable. It is exclusively offered to original owners who purchase their AS3 mattress from Amerisleep or an authorized retailer. Those who buy or acquire their mattress from the original owner or a non-authorized retailer will not be eligible for warranty coverage.
  • Delivery Details

    Delivery Policy

    The delivery policy for AS3 mattresses is as follows:

    1. Amerisleep mattresses typically ship within three to five business days of the original order; once shipped, they reach their destination in one to five additional business days.
    2. Free shipping is available to customers in the contiguous U.S. Those ordering from Alaska, Hawaii, or Canada can contact Amerisleep to learn about their current shipping rates.
    3. All Amerisleep deliveries are coordinated through FedEx Curbside Delivery; a customer signature is not required.

    How Is the Mattress Shipped?: Compressed and shipped in a box.
    Where Do They Ship?: All 50 states, as well as select locations in Canada.
    Delivery Fee: Shipping is free for all orders in the contiguous U.S., but additional charges will be applied for deliveries to Alaska, Hawaii, and Canada.

    Old Mattress Removal

    Amerisleep does not provide old mattress removal.

Amerisleep Coupons and Discounts

Get the best price on an Amerisleep AS3 mattress.

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