Tempur-Pedic vs Casper: which is the best soft mattress topper for side sleepers?

A split screen of Tempur-Adapt mattress topper vs Casper Comfy Mattress Topper
(Image credit: Tempur-Pedic / Casper)

Both the Tempur-Adapt Topper and the Casper Comfy Mattress Topper offer cushioning comfort to side sleepers who want to make a firm mattress softer. These 3" memory foam toppers are designed to add extra pressure relief to beds and are from two top-rated mattress brands: Tempur-Pedic vs Casper. But how do you choose between them?

Even some of our top picks in this year's best mattress guide will need a boost of comfort, and the Tempur-Adapt and Casper Comfy Mattress Topper have a place in 2024's best mattress toppers guide for doing exactly that. That's why this Tempur-Adapt vs Casper Comfy Mattress Topper comparison guide will explore which is better at providing side sleepers with the a good night's sleep. 

Here, we'll look at the key differences between the Tempur-Pedic vs Casper mattress toppers in terms of price, design, and comfort. We'll also take a look at when and where you can get the best deals on these bed toppers in this month's mattress sales.

Tempur-Pedic Tempur-Adapt vs Casper Comfy Mattress Topper: Specs

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Header Cell - Column 0 Tempur-Pedic Tempur-Adapt TopperCasper Comfy Mattress Topper
Type:FoamFoam
Materials:Tempur Material memory foamMemory Foam
Firmness:5.55
Depth:3"3"
Trial period:None30 nights
Warranty:10 years5 years
Price (MSRP):from $319from $199

Tempur-Pedic Tempur-Adapt vs Casper Comfy Mattress Topper: Price and deals

  • A queen Tempur-Adapt Topper is $419 at MSRP, but $251.40 when on sale
  • A regular 10% off deal takes a queen Comfy Mattress Topper to $269.10
  • Casper included a 30-night trial, but Tempur-Pedic don't offer a sleep trial 

The Tempur-Adapt Topper sits in the premium price bracket, with a queen costing as much as one of the best cheap mattresses. However, a sporadic 40% off Tempur-Pedic mattress sale can take the price down to upper-mid range. On the other hand, the Casper Comfy Topper is placed in the mid-range to upper mid-range tier, with a regular 10% off discount included. However, please be aware that, since its release, Casper has bumped up the topper's MSRPs, with a full retail queen size going from $249 to $299.

Casper Comfy Mattress Topper, featuring a woman resting on her back enjoying said topper on her bed

(Image credit: Casper)

The last time we saw a 40% off deal on the Tempur-Adapt was earlier this month for the 4th of July mattress sales. This 40% sale comes and goes, usually being rolled out around special occasions. However, if you can catch the deal, it will take a queen size from $419 to $251.40, saving you $167.60. It's also a great chance to try out the signature comfort of a Tempur-Pedic mattress at a fraction of the cost.

Tempur-Adapt Topper

(Image credit: Tempur-Pedic)

In terms of extras, both offer free shipping and warranties. Casper's last five years, while Tempur-Pedic's lasts 10 years. However, a 10-year warranty for a mattress topper may seem superfluous, as memory foam mattress toppers should be replaced every five years.

You can try out the Casper Comfy Mattress Topper for 30 nights before deciding if you want to return it thanks to the trial period. The Tempur-Pedic Tempur-Adapt, meanwhile, offers no trial and is non-returnable, which may be a deal breaker for some.

Tempur-Adapt Topper: $319 at Tempur-Pedic

Tempur-Adapt Topper: from $319 at Tempur-Pedic There's currently no sale on this Tempur-Adapt Topper at Tempur-Pedic, but the 40% off Tempur-Pedic mattress deal (which sees the price of a queen at $335.20) is rolled out during major holidays. Be aware that the bed topper is not returnable, but you will get free shipping and a 10-year warranty. 

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Tempur-Adapt Topper: from $319 191.400 at Tempur-Pedic The 40% off discount, which reduces a queen to $251, is now back on following last month's 20% off Tempur-Pedic mattress deal (which saw the price of a queen at  $335.20 instead. We advise taking advantage of this deal before it disappears again.

Tempur-Pedic Tempur-Adapt vs Casper Comfy Mattress Topper: Design and materials

  • Both toppers are 3" tall with an all-foam filling
  • The Tempur-Adapt has anchor bands and a removable, washable cover 
  • The Comfy Mattress Topper has a removable cover, but it's spot-clean only

The Tempur-Adapt Topper uses three inches of its signature Tempur-Material, a proprietary, NASA-developed type of memory foam that's designed to be more durable than the regular kind of memory foam. It's also designed to be more breathable, but our testers for our Tempur-Pedic Tempur-Adapt Topper review found it can sleep slightly warm. However, there is a $100 option to upgrade to a cooling cover with more advance temperature regulation. 

If you don't opt for a cooling cover, you'll still get a removable, machine-washable cover that's also dust-mite resistant and allergen-resistant. Attached to the cover are Tempur-Pedic's trademark Signature Staytight Straps, which our testers praised for keeping the topper from slipping and shifting. 

Casper Comfy Mattress Topper unzipped

(Image credit: Casper)

Meanwhile, the Casper Comfy Mattress Topper does not include anchor straps, and its quilted knit cover is removable but should be spot-cleaned only. However, our testers for the Casper Comfy Mattress Topper review found that the two layers of perforated, heat-dispersing foam offer comfort and excellent temperature regulation. The bottom layer is made from durable base foam, while the top is made from plusher AirScape foam, designed to provide body-cradling comfort and prevent body heat from becoming trapped.

Tempur-Pedic Tempur-Adapt vs Casper Comfy Mattress Topper: Support and Comfort

  • Both toppers are for side sleepers, but Casper is great for hot sleepers, too
  • The Comfy Topper offers support to heavy and lightweight side sleepers
  • The Tempur-Adapt has a plush, sink-in feel, but can sleep warm 

Overall, our reviewers for both the Tempur-Adapt and the Comfy Mattres Topper say that these are the best memory foam mattress toppers, especially for side sleepers. They also make great, cost-effective alternatives to the best mattresses for side sleepers

We found that the Tempur-Adapt offers outstanding pressure relief and molds to the side sleeper's shape for body-contouring comfort. However, back and stomach sleepers seeking more support, bounce, and responsiveness may need something with a little more structure and firmness. Hot sleepers should also consider upgrading to the cooling cover, as the breathable, soothing foam does sleep a little warm.

Woman lying on Tempur-Adapt Topper on her side

(Image credit: Michele Ross)

Meanwhile, the Casper Comfy Topper is a great option for both side sleepers and hot sleepers, as our testers found it delivers cloud-like comfort and softness while keeping them cool. 

The Casper topper is recommended mostly to side sleepers and lightweight sleeper. Our side-sleeping head tester for the Casper Comfy Topper is not lightweight, however, and felt perfectly comfortable and supported when sleeping on her side, back, and stomach. However, those who like a firmer feel (or sleep mostly on their stomach or back) may either want to try something less soft or make good use of the 30-night sleep trial.

Tempur-Pedic Tempur-Adapt vs Casper Comfy Mattress Topper: Which should I buy?

Buy the Tempur-Adapt Topper if...

 You want a luxe feel: The Tempur-Adapt Topper provides the signature luxurious softness of a Tempur-Pedic Mattress at a much lower cost.

 You want a non-slip topper: With anchor straps, the Tempur-Adapt does a good job of staying in place.

 You want an easy clean: This allergen-resistant topper comes with a machine-washable, removable cover for an easy clean. 

Buy the Casper Comfy Mattress Topper if...

 You're on a tighter budget: A lower MSRP, an evergreen 10% off deal, and a 30-night sleep trial means the Casper Comfy Topper is better value for money than the non-returnable Tempur-Adapt.

 You're a combi sleeper: If side-sleeping is your dominant position, but you occasionally sleep on your back or stomach, this should keep you kore supported.

 You sleep hot: This Casper Comfy Mattress Topper is made from two layers of heat-dispersing, perforated foam for a cooling sleep.

Frances Daniels
Sleep Staff Writer

Frances Daniels is a Sleep Staff Writer at Tom's Guide and her role includes covering all mattress and sleep news, in addition to mattress reviews and buyer's guides, plus sleep accessories such as pillows and mattress toppers. Frances is a PPA-accredited journalist and is hugely interested in the relationship between good sleep and overall health. When not writing about mattresses and sleep for Tom's Guide, Frances enjoys writing about women's issues, health and wellbeing, the environment, and her native Wales.