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Sleep Number C4 Review

Sleep Number C4 Review

Maltisa Driker
Contributing Writer
‍Updated on: January 19, 2024
   ·   Fact Checked
Fact Checked by

Maltisa Driker

Contributing Writer

Maltisa Driker is a fact-checker and researcher who has worked in the custom hoe building industry in sales, marketing, and design.

Learn more about B10M Editorial Process

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Key Takeaways


Sleep Number c4 is a firm mattres from Ikea with a polyester cover and a tight-top style.

They are adjustable air mattresses convenient for couples since each can choose the firmness on their bed side.

However they are criticized for sagging between the air chambers. This is an expensive option with a limited trial period that left many dissatisfied.


  • Ideal if you're primarily a back and stomach sleeper
  • No motion transfer


  • Far better (a) comfortable and (b) quality alternatives like Loom and Leaf.
  • Too expensive vs. superior alternatives.
  • Below average weight for a mattress (indicates low quality materials)
  • Extremely short (indicates low quality materials)
  • Average edge support

Real Reviews For Sleep Number C4

User 1: "I had horrible experience at sleep number."

User 2: "I want to share this in hopes it will save someone some trouble. Sleep Number mattresses are nothing but glorified low quality air mattresses and their customer service is horrible. If you try to return a mattress under their "in home trial period" you end up losing $400!"

Comfort, Feel & Firmness For Sleep Number C4

The sleep number c4 is a firm (roughly a 7-8 on a 1-10 firmness scale).

A firmer model like this is built for back and stomach sleepers that likely have back or spine issues and need correct spinal and cervical alignment (which is critical for long-term health).

Stay away if you sleep on your side. You won't get the contoured support your pressure points need if you're laying on a flat and even surface with very little 'give'.

The top style does a good job maintaining a flat and even sleep surface to maintain a firmer feel.

Side Sleeping On Sleep Number C4

The sleep number c4 is unfavorable for side sleepers.

Ensure to pick their most soft option. If you're not sure which model it is, contact them.

Anticipate tolerable support for fragile pain spots (specifically your low back, shoulders, hips, neck). The top foam layer relieves tension and pressure throughout the body ample.

NOTE: Make sure you have equally supported shoulders, hips, and torso if you sleep on your side. Otherwise, concentrated pressure can harm your nerves.

Back & Stomach Sleeping On Sleep Number C4

The sleep number c4 is amazing for stomach and back sleepers.

Make certain to choose their luxury firm (6.5/10), firm (7/10) or very firm (8/10) offering. If you're not sure which model it is, chat or call with them.

Count on passable support for spinal and cervical alignment (specifically your lumbar area). Somewhat firm foams on top keep your back straight shockingly well.

NOTE: Focus on finding a mattress that won't sink too far into your hips when sleeping on your back & stomach. It'll throw your spine out of alignment.

Construction & Design For Sleep Number C4

The sleep number c4 has several layers worth exploring:

• Bottom Layer: foam for sturdy support.
• Transition Layer: foam for padded pressure relief.
• Top Layer: foam for additional comfort & overall support along the top layer.
• Top Design: tight-top which does a fine job creating a larger sleep surface (good for couples).
• Cover: polyester which is fairly standard.
• Bed in a Box: no information available.
• Weight: 61 lbs (queen size).

Height For Sleep Number C4

The sleep number c4 height is 9".

Edge Support For Sleep Number C4

• Reasonable edge support because of its foam base.
Loom and Leaf is a startlingly good alternative if you want an astonishing edge support.

Note: If a mattress uses low-quality materials, it might feel supportive at first, but break down FAST.

Inadequate edge support means less sleep surface (which is not desirable, especially if you sleep with a partner).

Motion Isolation For Sleep Number C4

Count on wonderful motion transfer due to its foam base.

You or your partner won't feel any motion transfer, and plainly won't rouse you (even if you and your partner are light sleepers).

NOTE: Motion transfer is how much movement transfers from one side of the bed to another. Sleep on a mattress that offers effective motion isolation if your partner tosses and turns.

A better night's sleep leads to a happier life.

Return Policy For Sleep Number C4

There are several noteworthy considerations with the Sleep Number return policy:

• no clear return policy. Any return under an applicable in-home trial policy must first be authorized by them.

Exchange Policy For Sleep Number C4

• no clear exchange policy. Any exchange under an applicable in-home trial policy must first be authorized by them.

Find a brand with an exchange policy that doesn't force you to pay high fees for making an honest mistake.

Warranty Policy For Sleep Number C4

• has a 15-year limited warranty.

Look for warranties that have at least a 15-year period with no unreasonable limitations or transporation fees.

How Much Does Sleep Number C4 Cost

The price of the sleep number c4 queen size is 1799.

Check their site for the latest prices and discounts.

Customer Service For Sleep Number C4

• customer service depends on the retailer. Probably not good customer service if there are thousands of products, and mattresses are just one of them.

Where Can I Buy Sleep Number C4

You can buy Sleep Number at the following locations:

• on their site
• in their physical stores

Shipping Info For Sleep Number C4

Keep in mind the following info about Sleep Numbers shipping and delivery process:

• they offer free shipping via UPS.

Support & Motion Isolation For Sleep Number C4

Eco Friendliness For Sleep Number C4

Alternatives To Sleep Number C4

There are 3 fantastic alternatives to the Sleep Number C4 worth considering:

1. Saatva Classic (luxury pocketed coil hybrid): Durable innerspring hybrid that's extremely comfortable and built to last. Compares to top hotel mattresses in the world when it comes to comfort and overall feel. Ideal if you like little bounce but want support and fantastic value.

2. Loom and Leaf (high-density memory foam): Incredible mattress because it has zero motion transfer and excellent pressure relief while still half the price of Tempurpedic.

3. Zenhaven (100% organic and natural talalay latex): Best mattress money can buy. You should check out this mattress if you need a bed that has some bounce, but still fully envelops and supports your pressure points.

Final Verdict For Sleep Number C4

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 High-quality, premium materials
 Excellent support/pressure relief
 Luxury hotel-feel at affordable price
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