Eight Sleep started as a company in 2014 and a few years later began selling one of the first non-wearable sleep trackers. The company also launched its own foam mattress and has since updated its mattress offerings with 3 different models. Each model can be coupled with its sleep tracking product.

Some of the key strengths of the Eight mattresses include:

  • Innovative sleep technology: the Eight sleep tracker goes over the top of the mattress and both collects data and allows the sleeper to control elements of the mattress from their smartphone. For people who like to be on the leading edge of technology and who want to analyze data about their sleep patterns, the Eight sleep products are an exciting development.
  • Mix of mattress design choices: there is some overlap between the three mattress designs offered by Eight, but each also has unique elements. Customers looking for a more basic mattress can opt for the Saturn while those looking for memory foam (Jupiter) or a hybrid (Mars) also have options available.

Potential drawbacks for the Eight mattresses include:

  • Limited track record: the Eight Sleep mattresses are still new entrants into the mattress market, and as a result, there is a lack of verified reviews and no data about their long-term performance.
  • Still early days for sleep tracking: sleep science is complicated, and while sleep trackers can gather certain types of data, there is still a lot to learn about what that data means and how it can be used by any individual sleeper.



Eight Sleep Mattress Pricing

The Eight smart mattress is offered in 6 different sizes (Twin, Twin XL, Full, Queen, King, California King); however, the Smart collection, which includes the technology cover, is only available in 4 sizes (Full, Queen, King, California King). Prices ranges for each model are listed below.

Mattress Model Price Range 
Saturn $349 – $749 (Twin to Cal King)
Saturn+ $699 – $949 (Full – Cal King)
Jupiter $549 – $1,049 (Twin to Cal King)
Jupiter+ $999 – $1,249 (Full to Cal King)
Mars $749 – $1,399 (Twin to Cal King)
Mars+ $1,299 – $1,599 (Full – Cal King)


Interested in an Eight Sleep mattress?


About the Eight Sleep Mattresses

Eight Sleep Mattress Specifications

Eight offers three different mattress models. Each model has a slightly different internal composition, which are summarized in the table below.

Mattress Model Specifications
Saturn Top: 2” of 3 PCF density poly foam
Middle: 2” of 1.8 PCF density transition foam
Bottom: 6” of 1.8 PCF density support foam
Jupiter Top: 2” of 3 PCF density polyfoam
Second: 2” of 4 PCF density memory foam
Third: 2” 1.8 PCF density transition foam
Bottom: 4” 1.8 PCF density support foam
Mars Top: 2” of 3 PCF density polyfoam
Second: 2” of 1.8 PCF density transition foam
Third: 4” of sleeved innerspring coils
Bottom: 3” of 1.8 PCF density support foam


In the Standard mattress collection, these mattresses are sold without any additional technology. In the Smart mattress collection, identified in name by the “+” sign, these same mattresses are sold with a smart cover. This is the technology layer, which is not built into the mattress itself but is a cover that goes over the rest of the mattress. This technology acts as a sleep tracker, monitoring your movement to understand sleep trends. It also helps control bed temperature, morning alarms, and allows for integration with other WiFi-enabled home devices.

The Eight Sleep Tracker mattress cover can also be purchased independently and can be used on other types of mattresses as well.


Where It’s Made

The Eight Sleep mattresses are manufactured in the USA.

Buying Logistics

Where To Buy

The Eight Sleep mattresses are available online directly from the company and through Amazon. The company also has one showroom in New York City.

Sleep Trial / Refunds

Eight offers a 100 night sleep trial. The company expects customers to try the mattress and sleep tracker for 30 nights. After that point, customers can return either the sleep tracker, the mattress, or both. If you choose to keep one of these two items, you will only be refunded for the item that is returned.

If you return the mattress, Eight will work with you directly with suggestions mattress disposal options based on your location.


These mattresses are shipped for free within the continental United States. The mattress typically arrives within 7-10 days after it is ordered.

No installation or haul-away of your old mattress is offered as part of the delivery. The mattress and sleep tracker arrive in boxes on your doorstep. The mattress is compressed within plastic packaging, and once this packaging is removed, the mattress expands to reach its full size. It may take 24 hours to reach its full firmness.

Eight sleep box


The Eight Sleep mattresses comes with a 10-year warranty. During this warranty period, the company will repair or replace a defective mattress.

This 10-year timeframe does not apply to the mattress covering or to the sleep tracker technology layer. The cover has a 2-year warranty, and the sleep tracker comes with a 1-year warranty.

You can read the full warranty terms online at https://content.eightsleep.com/eight-smart-mattress-warranty/.

Customer Service

The Eight sleep company has not been in the industry long enough to have a true measure of its commitment to customer service. To date, there are limited reports — either good or bad — about this. The company has a D+ from the Better Business Bureau.


Mattress Performance

It is typically easiest to think of the Eight smart mattresses as two different parts. One part is the mattress itself, and the other part is the sleep tracker technology system. Most of our review will focus on the mattress itself as opposed to the Smart technology cover, although many users may find the sleep tracker to improve their sleep habits and ultimately their mattress performance.


Each of the Eight Sleep mattress models has a top comfort layer of polyfoam. In the Jupiter model, this is reinforced by a layer of memory foam. Memory foam has an excellent track record for providing support. This track record derives from its responsiveness to different pressure points in the body.

The Saturn mattress model has a transition foam layer but no additional foams in the comfort layer. While this may be sufficient for some sleepers, we generally prefer comfort layers to be at least 3” thick. This is more likely to pose problems for heavier sleepers, side sleepers, or people with more pronounced pressure points.

The Mars mattress model adds additional support through a 4” layer of innerspring coils. A combination of coils and foam can typically produce a quality combination of supportiveness and comfort.

One other issue to consider is that the sleep tracker provides a small buffer between the body and the mattress comfort layer. This has the potential to very slightly reduce the responsiveness of these top layers of foam, especially for sleepers who weigh less and may put less pressure on the mattress in the first place.


The Eight mattresses have not been on the market long enough to judge their durability over the long-term. The top 2” of the comfort layer on each model has only 3 PCF density, which is less than the 3.5 PCF that we would typically prefer to see in a top layer. Overall, though, most of the internal components are of roughly-average density, which should provide a roughly-average level of durability.

It may also be useful to keep in mind that the technology layer is likely to have a shorter lifespan than the mattress itself. As a result, customers may need to purchase more than one sleep tracker to last the usable life of the mattress itself.


Each Eight Sleep mattress model is offered with only one firmness option, but each model has a different firmness level. The Saturn falls as a 6-7 on the typical firmness scale, the Jupiter is a 5-6, and the Mars is closer to a 5.

Motion Transfer

The Eight Sleep mattresses can be considered to be roughly average for foam mattresses when it comes to motion transfer. These mattresses are unlikely to offer as much motion isolation as traditional memory foam but are still likely to offer enough motion isolation to prevent major sleep disturbance issues for most couples.


Virtually all foam mattresses, including the Eight Sleep mattresses, have an initial odor after they are delivered and removed from their packaging. Any odor should go away within a few hours or a few days at most and is not harmful.

Sleeping Hot

The comfort layer for the Eight Sleep mattresses are intended to balance support and responsiveness. A result of this is that they do not have the same extensive amount of hug found with traditional memory foam. This can help prevent sleeping hot as there is more room for airflow and breathability around the body. In addition, the technology layer allows for people to have more control over bed temperature, which also works to reduce any heat retention issues.


The biggest disruption to sexual activity on a mattress occurs when the mattress is too soft or has too much sink, causing people to feel stuck in the mattress. With its polyfoam top layer, this is unlikely to be the case with the Eight mattresses.


Mattress Comparison

The table below provides a comparison of some mattresses with similarities to the Eight mattresses in terms of construction and feel.

Brand Mattress Type Support Layer Comfort Layer Price (Queen) Where to Buy
Eight Foam Foam Memory Foam + Latex-like Foam $949 Online + 1 showroom
Casper Foam Foam Memory Foam + Poly Foam $950 Online + some retail
Leesa Foam Foam Avena Foam $940 Online + 1 showroom
GhostBed Latex Hybrid Foam Memory Foam + Latex $795 Online only
Saatva Innerspring Hourglass coils Coils + Foam $999 Online only
Purple Foam Foam Hyper-Elastic Polymer $999 Online only


Interested in an Eight Sleep mattress?

by: Eric Seger