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The Mars+
The Mars+
The Mars+
The Mars+
The Mars+
The Mars+
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The Mars+

The Mars+

1,001 Reviews
left in stock
Hybrid of sleeved coils and soft foam layers for medium-soft firmness and breathability. Includes our smart technology cover.
  • Full
  • Queen
  • King
  • Cali King
  • Full - 54 X 75 X 11 in.
  • Queen - 60 X 80 X 11 in.
  • King - 76 X 80 X 11 in.
  • Cali King - 72 X 84 X 11 in.
Free 2 Free Comfort Pillows
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The Comfort Pillow

The Comfort Pillow

Luxury cotton cover, comfort down alternative filling.

Add The Simple Foundation
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The Simple Foundation

The Simple Foundation


Designed to support any mattress, it can be assembled in minutes, no tools required! Upholstered with the finest fabrics and engineered with the strongest pine, our foundation is made to last. 

Add The Waterproof Protector
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The Waterproof Protector

The Waterproof Protector


The ultimate waterproof protection for your mattress. Place it under the Smart Cover to make your mattress last longer. *Note: this protector does not include any technology.

Select a size

Free Shipping

Free Returns

10 Year Warranty

Try it for 100 nights

If you don't sleep better in the first 100 nights, you can request a full refund. No re-stocking fees, no return shipping or disposal fees.
"Love this bed, super innovative"
"Glad I purchased this and not a regular bed. This is the future!"
"Most comfortable bed I've ever slept on"
"Love the smart features!"
"It's my favorite mattress in the house"
"I honestly can't complain!"
"We love the comfort and the features."
"The dual side warming allows us to both be comfortable. Absolutely love this bed."
"The first mattress I've been able to sleep comfortably on in 4 years"
"I have had two neck surgeries and spinal cord damage so this means a lot."

The Mars+

The mattress unlike any other

A medium-soft mattress paired with smart cover for sleep enhancement.

2" Reactive Foam

Hugs like foam, reacts like latex.

2" Comfort Transition Foam

Pressure relief in hips and back.

4" Sleeved Coils Surrounded by Polyfoam

Cool air flow, cloud-like bounce.

3" High Density Support Foam

Top density for max durability.


Unparalleled technology for better sleep

With proprietary sensors embedded in the mattress, our technology leverages your sleep patterns and bio signals to help you recover 100% every night.


Enjoy a better
sleep experience

Using your sleep data, Eight helps you design the sleep experience of your dreams to make you feel refreshed in the morning.

Sleep tracking

Track over 15 factors about your sleep and health, including REM sleep, deep sleep, heart rate and respiratory rate.

Temperature Control

Sleep cold? Warm your bed side. Sleep hot? Blast the bedroom AC while warming your partner's side.

Smart Alarm

Eight detects when you are in light sleep and triggers the alarm when it's easier for your body to wake up.

Smart home

Make it a part of
your smart home

Connect your Eight mattress to your smart home. Let it turn off your lights when you doze off, or brew your coffee when you wake up.
smart home

Amazon Echo

Ask Echo to warm up your Eight bed or tell you how you slept.


Cool down or heat your home in sync with your sleep.

Philips Hue

Turn your lights on and off in sync with your sleeping schedule.

And more

With IFTTT integrated into our hub - your possibilities are endless.
View product specs

Measurements and dimensions

  • Full: 54" x 75" x 10"
  • Queen: 60" x 80" x 10"
  • King: 76" x 80" x 10"
  • California King: 72" x 84" x 10"

11 inches tall

Sensors and technology

Smart cover:

  • Smart cover with sensors to track sleep, heart and respiratory rate
  • Plus bed temperature sensors and heating capabilities
  • Light and room temperature sensors in hub

App compatibility

iOS and Android


Wi-Fi connection

iOS 9 or later, or Android 5 or later


Compatible with 110V and 220V


Standard U.S. two pin plug


100-night trial, free returns
Mattress: 10-year limited warranty

Technology layer: 1-year limited warranty

Country of origin

Technology layer designed in California, assembled in China.

Shipping details

Free U.S. shipping and returns

Mattress ships in a 46" x 16" x 16" box
Technology layer ships in a 19.5" x 15.5" x 10.25" box


Mattress contains a fire retardant barrier to comply with regulations. This material, otherwise known as an FR sock, is a fabric that encases our materials. It helps to smother and subdue a potential fire from spreading. Each of the four foams are CertiPUR-US certified. They meet program standards for content, emissions, and durability, and are analyzed by independent, accredited testing laboratories. CertiPUR-US approved foams are: made without ozone depleters, PBDE flame retardants, mercury, lead and other heavy materials; made without formaldehyde, phthalates regulated by the Consumer Product Safety Commission; have low VOC (volatile organic compound) emissions for indoor air quality (<0.5 parts per million).

Philip J.
Verified Reviewer

It's a no brainer

Comfortable bed plus tech features! I mean, who wouldn't? I had just purchased another brand but then I saw this and said c'ommon! I gotta have it. It was a great deal too. so far I'm quite pleased. Highly recommend it.
Lila G.
Verified Reviewer

Comfortable + amazing tech

This mattress really has it all. They are knocking it out of the park compared to every other mattress you can buy online. It's affordable, comfortable, has technology that is super cool to see how you sleep. I'm enjoying it every night and can't wait to see how it progresses with more software features.
Rob G.
Verified Reviewer

Great innovative mattress

This bed is top notch, great innovation and I have been sleeping better than ever. Kudos to the Eight team for creating this smart mattress.
Stephen T.
Verified Reviewer

Tried many beds, this is the WINNER

I've been mattress shopping many times in the past two years. Tried many beds. Eight is the winner without a doubt. I will never buy a regular bed again!
Zachary B.
Verified Reviewer

Say goodbye to back pain

This bed is soooo much better than my old Ikea. Two thumbs up! No more back pain for me or my wife.
Raji F.
Verified Reviewer

Finally a sleep innovation

This product is really innovative, finally someone doing interesting things in sleep and not just boxing a bed. I recommend it to all my friends because it's not only a great bed but it also lets you know how you sleep and why you sleep that way. Enjoying it so far.
Cynthia T.
Verified Reviewer

Plushy, cushy, cozy

This bed is suuuuuper comfy. It feels very high quality, even the packaging and the app. Great product overall and wonderful bed!
Lilla B.
Verified Reviewer

Awesome technology

I checked a lot of reviews before buying and this was the only mattress with technology. It is so cool to have the same comfort of other mattresses (I tried Casper and Leesa) and sleep tracking and warming.
Usain G.
Verified Reviewer

Super comfortable

I tried other 4 foam mattress before this but this one has the same comfort, a cheaper price and all the technology. No brainer
Judy P.
Verified Reviewer

Love the warming

I love the warming. I use the timer every night to start warming up my bed before going to bed.

Best mattress for back pain

Top mattresses of 2018

Most Innovative Companies of 2018

You're in control

Design your whole set

The Adjustable Base

Position yourself for success


The Waterproof Protector

Ultimate waterproof protection


The Cool Pillow, 2-pack

Cool to the touch all night long