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Casper vs. Cocoon Chill Mattress Comparison

Written by Tuck Staff

The Bottom Line.

  • The Casper Original is a medium-feel mixed-foam mattress that conforms closely to cushion the body and alleviate pressure.
  • The Cocoon Chill is constructed with adaptive memory foam and a phase-change cover to help sleepers remain cool.
  • Both mattresses offer excellent motion isolation for those who share a bed.

Casper vs. Cocoon by Sealy Chill Mattress Overview

Casper vs. Cocoon by Sealy Chill Mattress Overview

Established in 2013, Casper has since become one of the most popular “bed-in-a-box” mattress brands in the U.S. The company’s flagship model, known as the Casper Original, is a mixed-foam bed constructed with a polyfoam comfort layer and zoned memory foam transitional layer. The mattress also includes a support core of high-density polyfoam, as well as a cover made from a blend of fabric and recycled materials. In terms of firmness, the Casper Original is considered medium, which rates as a 5 on the 1-10 firmness scale. The mattress also measures 11 inches thick, making it a medium-profile model.

Sealy is a major brick-and-mortar mattress brand dating back to 1881. In recent years, the company has introduced some bed-in-a-box models to its lineup. Their newest online mattress, the Cocoon Chill, is an all-foam model featuring a memory foam comfort layer over transitional and support layers of high-density polyfoam. The bed’s cover is infused with phase-change material (PCM), which is designed to help the surface maintain a comfortable temperature. Customers can choose a medium soft (4) or medium firm (6) feel for their Cocoon Chill. The mattress measures 10 inches thick and is also considered a medium-profile model.

The Casper Original and Cocoon Chill share many similarities. Both are all-foam beds with mid-level feels that excel in areas such as motion isolation, pressure relief, and noise. However, there are a few key differences between these mattresses, as well. In this comparison guide, we’ll see how the Casper Original and Cocoon Chill stack up in terms of construction, pricing, and performance. We’ll also examine the shipping, return, and warranty policies of both brands.

Please note: Casper offers additional bed-in-a-box mattresses, but this comparison will solely focus on the Casper Original and Cocoon Chill. To learn more about these other mattresses, please visit our Casper Hybrid Mattress Review, Casper Wave Hybrid Mattress Review, and Casper Nova Hybrid pages.

Compare Offers

The Casper

Save $100 on your Casper mattress.

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Cocoon Chill

Our readers save 35% on the Cocoon Chill by Sealy.

Checkout code = TUCK35

Meet Our Testing Team

Ratings Comparison

Full Sleep Rating


Full Sleep Rating

Motion Isolation
Pressure Relief
Temperature Neutrality
Edge Support
Motion Isolation
Pressure Relief
Temperature Neutrality
Edge Support
Casper Original Highlights…
  • The mattress has a medium feel, resulting in close body-contouring and pressure relief for people who weigh up to 230 pounds.
  • Thanks to breathable comfort layers, the Casper Original sleeps a bit cooler than many competing all-foam mattresses.
  • The Casper Original offers excellent motion isolation and does not produce any noise, making it a great choice for couples.
Cocoon Chill Highlights…
  • Available with medium soft and medium firm feels, the Cocoon Chill offers a firmness range that should appeal to buyers across different weight groups and sleep positions.
  • Like the Casper Original, the Cocoon Chill isolates motion very well and does not make any disruptive noises when bearing weight.
  • If budget is a factor for shoppers, the Cocoon Chill has a lower price-point in most sizes than the Casper Original.

Sleep Position Ratings

Casper Original

The Casper Original has a medium feel and will contour closely to the sleeper’s body. This makes the mattress well suited to side sleepers because this position often demands more cushioning for the shoulders and hips, which in turn promotes spinal alignment and reduces pressure in these areas. This is particularly true for side sleepers weighing up to 230 pounds, though many heavier people who use this position also find the mattress comfortable.

Back and stomach sleepers typically need more support from their mattress to prevent sinkage between the shoulders and hips, where people tend to carry more weight. Otherwise they are susceptible to aches and pains in different areas of the body, namely the neck, shoulders, and lower back. The Casper Original offers a good balance of contouring and stability for back and stomach sleepers weighing up to 230 pounds. Heavier people who use the back and stomach sleep positions will probably find the mattress too soft and sink excessively.

Cocoon Chill

Since the Cocoon Chill is available in two different firmness levels, the mattress will accommodate a wider swath of sleepers than the single-firmness Casper Original. The Cocoon Chill’s medium soft version conforms very deeply, creating a body-hugging sensation many people liken to sleeping “in” – as opposed to “on” – the mattress. While heavier individuals may also find this feel comfortable, we believe it is best suited to those who weigh less than 130 pounds.

The Cocoon Chill’s medium firm feel offers more reinforcement, but sleepers still sink a bit beneath the surface. This characteristic can be especially problematic for back and stomach sleepers weighing more than 230 pounds. We recommend the medium firm Cocoon Chill to side, back, and stomach sleepers who weigh between 130 and 230 pounds because this feel delivers adequate support while still conforming and reducing pressure.

Our Recommendations

Choose the Casper Original if...

  • You want a softer mattress that conforms closely to the body
  • You and/or your sleep partner tend to wake up due to movement or noise.
  • You weigh up to 230 pounds
  • You normally sleep hot on all-foam beds

Choose the Cocoon Chill if…

  • Your firmness preferences range between medium soft and medium firm
  • You’re looking for a mattress that reduces motion transfer and doesn’t make noise
  • You weigh up to 230 pounds
  • You sleep on your side

Technical Details Comparison

Sizing and Pricing

Prices for the Casper Original and Cocoon Chill in each available size are listed below.

  • twin-bed
    Twin $695 (Casper) $730 (Cocoon)
  • twin-bed
    Twin XL $795 (Casper) $770 (Cocoon)
  • twin-bed
    Full $995 (Casper) $850 (Cocoon)
  • twin-bed
    Queen $1,095 (Casper) $1,080 (Cocoon)
  • twin-bed
    King $1,495 (Casper) $1,310 (Cocoon)
  • twin-bed
    Cal King $1,495 (Casper) $1,310 (Cocoon)

Mattress Construction

Next, we’ll take a closer look at how the Casper Original and Cocoon Chill are constructed. Materials and specs for these models are outlined below.

Specification Casper Original Cocoon Chill
Firmness Options Medium (5) Medium Soft (4)
Medium Firm (6)
Thickness 11″ 10″
Weight (Queen) 71 lbs. 64 lbs.
Support Core Components 7″ 1.8 PCF HD Polyfoam Medium Soft:6″ 2.2 PCF HD Polyfoam
Medium Firm:8″ 1.8 PCF HD Polyfoam
Comfort Layer Components 1.5″ Polyfoam
2″ PCF Zoned Memory Foam
Medium Soft:2″ 3 PCF Memory Foam
2″ 1.8 PCF Polyfoam
Medium Firm:2″ 3 PCF Memory Foam
Cover Composition Recycled Polyester, Polyester, Upcycled Cotton, Rayon, and Spandex Polyester and Cotton Infused with Phase-change Material

How Is the Casper Original Built?

The Casper Original begins with a comfort layer of open-cell polyfoam, a breathable and adaptive material that contours to the body. However, the polyfoam is a bit more responsive than memory foam, so sleepers can expect a light bounce when they get in and out of bed. The comfort layer is reinforced with a memory foam transitional layer that also contributes to the bed’s conforming feel. This layer is divided into firmness zones, ensuring enhanced support to the midsection while cradling the head, shoulders, and legs.

The Casper Original’s support core consists of high-density polyfoam measuring 7 inches thick. This material stabilizes the entire mattress and is intended to reinforce the sleep surface and along the edges, but – like other softer all-foam mattresses – the Casper Original still tends to sink a bit. The cover is constructed from a blend of fabric and recycled materials, including up to 45 recycled plastic bottles per mattress. Altogether, the Casper Original measures 11 inches thick.

How Is the Cocoon Chill Built?

The Cocoon Chill’s design is a bit different from the Casper Original’s. This mattress is constructed with a top memory foam layer over a polyfoam transitional layer, so sleepers immediately feel that signature memory foam body-hug as soon as they lie down on the surface. The material softens when exposed to body heat, so it responds slowly. The medium soft Cocoon Chill will contour more closely, but the medium firm models also conform to a noticeable extent.

As with the Casper Original, the Cocoon Chill’s support core is made of high-density polyfoam. Sleepers will notice more sinkage on the medium soft models, but the medium firm models also sink a bit – especially along the edges. The Cocoon Chill’s cover is made of cotton and polyester infused with phase-change material (PCM), which is designed to dissipate body heat from the surface and help the mattress maintain a cool temperature. Some sleepers claim PCM is effective at reducing surface warmth, but for many, the foam layers will still trap some heat and cause the mattress to sleep hot. The Cocoon Chill measures 10 inches thick.

Casper Sleep Trial, Warranty, and Delivery

  • Sleep Trial 100 nights

  • Shipping Free to contiguous U.S. and Canada

  • Warranty 10 years, non-prorated

  • Made In USA

  • Trial Period Details

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

    1. The trial begins when the mattress is delivered. Customers can contact Casper and initiate a return for a full refund at any time during the 100-night trial period.
    2. When a return is initiated, the company will arrange to have a courier pack up and remove the item.
    3. Returned mattresses are donated or recycled by Casper.
    4. Casper will provide a full refund for mattresses ordered directly from Casper. However, mattresses ordered from third-party retailers such as Amazon may be subject to additional return fees.
    5. Customers can also exchange their Casper Mattress during the 100-night trial period. An exchange for a different Casper Mattress model will begin a new 100-night trial period, but exchanges for a different size or color of the same model will void your current 100-night trial.
  • Warranty

    Casper offers a 10-year warranty:

    1. The Casper warranty is entirely non-prorated.
    2. The warranty will be voided if the mattress is not used with a proper foundation that provides support.
    3. The company will cover all shipping costs associated with the repair or replacement of a defective mattress.
    4. The warranty will cover the following defects: sagging or indentations in the mattress deeper than 1 inch; physical flaws that result in the splitting or cracking of the mattress foam; and manufacturing defects for the mattress cover zipper.
    5. The warranty will not cover the following: sagging or indentations in the mattress less than 1 inch deep; physical damage due to misuse; and repair or replacement requests as a result of changes in the owner’s preferences.
    6. The Casper warranty is non-transferable and only applies to the original owners who purchased the mattress from Casper or an authorized retailer.
  • Delivery Details

    Casper’s delivery policy is as follows:

    1. Casper offers free shipping to the 48 contiguous United States and most of Canada. Shipping charges apply to Alaska, Hawaii, and Northern Canada (Yukon, Northwest, and Nunavut territories). Casper also ships to certain countries in Europe.
    2. Casper uses FedEx for delivery in the United States and Canada. Delivery typically takes between two to seven business days after placing an order.
    3. In addition to free standard FedEx delivery in the United States and Canada, Casper offers White Glove delivery service. This includes in-home mattress assembly for a flat rate of $149 and an option to remove and recycle your old mattress.

Casper Coupons and Discounts

Save $100 on the Casper Original as a Tuck Sleep reader.

Checkout code = TUCK

Sealy Sleep Trial, Warranty, and Delivery

  • Sleep Trial 100 nights

  • Shipping Free to all 50 states

  • Warranty 10 years, non-prorated

  • Made In USA

  • Trial Period

    Sealy offers a 100-night sleep trial for the Cocoon Chill:

    1. This trial does not require a break-in period, although the company recommends trying the mattress for at least 30 days before making a decision.
    2. Customers who decide to return the mattress during this trial can opt to try the other firmness model instead.
    3. If the mattress still isn’t the right fit, Sealy will arrange for the mattress to be picked up and donated, recycled, or disposed of. There is no need to put the mattress back into the box.
    4. Refunds will be credited to the customer’s card within one to two business days.
  • Warranty

    Sealy offers a 10-year warranty for the Cocoon Chill:

    1. The warranty is completely non-prorated. During this 10-year period, Sealy will repair or replace defective mattresses at the company’s discretion. The customer will only be responsible for the shipping fees. Warranty claims do not extend the life of the warranty.
    2. The warranty dates from the initial purchase date and only applies to the original purchaser for mattresses purchased from Sealy or an authorized retailer.
    3. The mattress should be used with a solid surface as described in the warranty that is capable of supporting the weight. Use of the mattress with an improper foundation will void the warranty. Sealy may request proof of the quality of the foundation, bed frame, or adjustable bed base before approving a claim.
    4. The warranty covers physical flaws such as visible indentations of 1 inch or more, or torn covers in mattresses that have not been subjected to abnormal wear and tear. Unsanitary mattresses are not eligible for warranty claims.
    5. The warranty does not cover normal increases in softness, individual comfort preferences, physical abuse or damage including burns, cuts, tears, stains, or other defects resulting from misuse or abuse of the mattress or use without proper support.
    6. Under the terms of the warranty, customers may choose to upgrade to a more expensive product and pay the difference. In this case, customers will also be responsible for paying the cost of any related pieces that are not being replaced under the warranty. New articles will come with a new warranty.
  • Delivery Details

    The delivery policy for the Cocoon Chill mattress is as follows:

    1. All mattresses are shipped free via UPS Ground. For expedited or Saturday delivery options or to change the address on the shipping order, customers should contact Sealy.
    2. Shipping times vary but the Cocoon Chill mattress usually arrives within five to seven business days after the order has been submitted.
    3. The mattress is compressed and shrink-wrapped for shipping. In most cases, couriers will leave the mattress on the doorstep if nobody is home at the time of delivery.
    4. To set up the Cocoon Chill, place it on the bed foundation, remove the tape, pull it apart at the seam, and let it unfurl. The mattress will regain a natural shape almost immediately, but it should be left for 24 hours to allow it to reach its full size.

Sealy Coupons and Discounts

Save 35% on the Cocoon Chill mattress.

Checkout code = TUCK35

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