Plush softness with adjustable comfort

Sleep Number ® c4 bed is rated 3.9 out of 5 by 197.
Rated 5 out of 5 by from Best purchase I ever made! My whole life I would wake up sore and achy in the morning and thought it was normal. That I just had to stretch and move around a little bit to get rid of the pain. That all changed with my sleepnumber bed. My life changed after my first nights sleep. I was rejuvenated and pain free that morning and every morning after. Having the ability to adjust the firmness to how you feel makes all the difference in the world. My wife feels the same way. I recommend sleepnumber o everyone I know!
Date published: 2017-02-22
Rated 5 out of 5 by from Comfort for both my husband and I. I love that my husband and I can both get a good night's sleep on this mattress. He sets his side at 65, my side has to vary from 40 down to 30 because of hip problems. It has made such a difference in the way we both feel in the morning. Thanks to Sleep Number!
Date published: 2017-02-20
Rated 5 out of 5 by from the best I really like being able to adjust the firmness of the mattress
Date published: 2017-02-15
Rated 5 out of 5 by from Better than advertised! :) We bought a king sized c4 to replace a soft-sided waterbed that was 10 years old and starting to get "mushy". We kept the existing platform box underneath and just bought the c4 mattress. Wow! Here's the crazy part: we had it delivered to the house and assembled it ourselves! And it was super easy! I know, right? The bed is everything the folks at the store told us it would be. We are happy with our purchase and recommend this type if you are looking for an affordable Sleep Number that is easy to assemble, care for, and sleep on!
Date published: 2017-02-15
Rated 5 out of 5 by from great value I bought this C4bed about a month ago. I had an older version that I had bought 16 years ago and loved it. So I had no choice, plus after comparing this type of bed to a conventional mattress, this is much cheaper, about 1/2 the cost, and the added feature of it being adjustable is great. Delivery was very timely and easy to set up. To me this type beats all of the regular type mattresses on the market.
Date published: 2017-02-14
Rated 5 out of 5 by from Wonderful adjustable comfort This is my second Sleep Number bed. My first was a twin I purchased in the late 1990's. I had a crushed pelvis, crushing fractures of both lets, left ribs and left arm in 1996. These left me with severe pain and over 45 surgeries. I was not comfortable anywhere. I also purchased an expensive memory foam bed. I had to go back to my Sleep Number bed due to pain I had when trying to sleep on the memory foam bed. I gave the memory foam bed to my son when I purchased this C4 mattress and have been able to sleep most of the night. I can set it for less pressure when I need and increases the air when I need more firm. I can't say enough about this mattress. Love, love, love it!
Date published: 2017-02-13
Rated 5 out of 5 by from Like sleeping on a cloud!!! I bought this bed as a Christmas for both my husband and myself. I love it....so hard to get out of bed in he mornings.
Date published: 2017-02-12
Rated 5 out of 5 by from I love this bed. I like sleeping on a softer mattress than my husband does and this allows that. Don't bother with sleep iq though - it really doesn't make much sense. It will tell me that I slept for 6 hours and that it took me an hour to fall asleep and then give me a score of 85; while telling my husband that he slept for 7 hours and it took him 10 minutes to fall asleep and then give him a score of 80.
Date published: 2017-02-11
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c4 Sleep Number® bed

Feel the benefits of zoned cushioning for neck, back and hips.


DualAir adjustability

Allows you to adjust firmness, comfort and support on each side of the bed to your ideal Sleep Number® setting, and change it whenever you like.


Plush-style bed is measured from the base to the top of the mattress.

Comfort layer

Soothing foam is designed to contour to your entire body.

3 zones of contouring support

Pressure-relieving zones contour to your head and neck, back and hips.

Soft, breathable knit fabric

Polyester/polypropelene blend is soft and breathable so you sleep comfortably.


SleepIQ® technology

Using sensors inside the bed, SleepIQ® technology tracks your breathing, heart rate and movement. Every morning your SleepIQ® score shows you exactly how you slept, so you can learn and make adjustments.

FlexFit Adjustable Bases

Upgrade to an adjustable base to raise the head and/or foot of the bed and read, watch TV, or surf the web in ultimate comfort. Includes options you'll love, such as Partner Snore technology, available when you customize your bed.

Sleep Number
Adjust Your Idea of Comfort
Firmer or softer? You both get to choose your ideal level of firmness, comfort and support–your Sleep Number® setting–and change it whenever you like.
Add SleepIQ® technology
The Sleep Number® bed with SleepIQ® technology inside tracks how well you sleep each night, giving you personal insights into your sleep.
Sleep Number
Discover your ideal bedtime, wake up time and how many hours you need for your best sleep.
The bed connects to your favorite apps so you'll know how life affects your sleep and how sleep affects your life.
SleepIQ® technology on the inside of the bed tracks how well you sleep each night
You'll learn what affects your sleep and the changes you can make to improve your SleepIQ score.
Sleep Number
Add a FlexFit adjustable base to any mattress.
Read, watch TV and surf the web in ultimate comfort. Our FlexFit adjustable bases include choices you’ll love, like Partner Snore technology and soft under bed lighting.
Sleep Number
Feel, see, and hear the difference
You'll only find Sleep Number® at a Sleep Number® store

Product Reviews

Product Reviews

Product Q&A

Product Q&A

Due to the cost of doing business in California, Performance, Memory Foam and Innovation Series Twin and Full mattresses incur a $50 surcharge; Queen and King mattresses incur a $100 surcharge. The surcharge will be added in your shopping cart after you enter your shipping address. Picture may not represent options selected.