Sleep Number 360 C2 vs. C4 Mattress Comparison

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Can’t choose which Sleep Number Mattress fits your needs? We’re here to help. This review will go in-depth on the differences between the Sleep Number 360 C2 and 360 C4 smart mattresses and how each can benefit your sleeping needs. Check out more about these mattresses from our testing methodology.

Product
Firmness
Score
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Sleep Number 360 c2 Smart Mattress
Multiple firmness options
3.9/5
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Sleep Number 360 c4 Smart Mattress
Multiple firmness options
4.2/5
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Product
Sleep Number 360 c2 Smart Mattress
Firmness
Multiple firmness options
Score
3.9/5
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Product
Sleep Number 360 c4 Smart Mattress
Firmness
Multiple firmness options
Score
4.2/5

Sleep Number 360 C2 vs. C4 Overview

Both Sleep Number 360’s C2 and C4 variants have distinct features that make them reliable mattresses.

C2 is best for…C4 is best for…
Back sleepersCombination sleepers
Budget-conscious shoppersStomach sleepers
Couples

Who Should Choose the C2 Mattress?

  • Back sleepers: Back sleepers can indulge in the supportive firmness options that C2 mattresses offer. You can customize its firmness based on your desired level of comfort.
  • Budget-conscious shoppers: C2 is an 8” mattress that allows you to sleep comfortably without breaking the bank.

Who Should Choose the C4 Mattress?

  • Combination sleepers: The C4 mattress has a responsive foam that allows combination sleepers to feel at ease when sleeping. It acts like a dough that conforms to any conceivable position.
  • Stomach sleepers: You can get the right comfort sleeping in your stomach with a C4 mattress since it allows alignment of your spine down to your back due to its firmness level.
  • Couples: Couples and even those who sleep with their pets will enjoy the comfortable, customizable firmness level of the C4 mattress.

Sleep Number 360 C2 vs. C4: Top Similarities 

  • Temperature Regulation: Sleep Numbers C2 and C4 offer a cooling material layer that is best for hot sleepers. It regulates the mattress temperature to absorb heat, keeping the mattress cool.
  • Firmness Options: C2 and C4 allow you to decide what firmness of the mattress you would like. They have inflatable air foam material so you can control the air to choose your desired firmness for the mattress.
  • Durability: The Sleep Number C2 and C4 mattresses have sturdy and durable materials with a 15-year warranty.

Sleep Number 360 C2 vs. C4: Top Differences 

  • Mattress Firmness: Although users can choose a specific firmness level for both mattresses, C4 has a slightly softer feel than C2 due to its extra layer of comfort foam.
  • Pricing: Typically, if you are a budget-conscious shopper, C2 is a more affordable mattress than the C4.
  • Mattress Construction: Both mattresses have similar components, but the C4 has more comfort foam than the C2.

Sleep Number 360 C2 vs. C4: Firmness & Feel Differences

In this section, let’s dive into the firmness and feel of these two unique mattresses.

What’s the Firmness of the C2 & C4 Mattresses? 

While C2 and C4 are great for couples due to their customizable mattress firmness, these mattresses feel the best for light to average-weight sleepers. That means you’ll likely be comfortable sleeping on these mattresses if you weigh less than 230 lbs. On the other hand, heavyweight sleepers might not get the right support and comfort when sleeping on either of these mattresses.

What Do the C2 & C4 Mattresses Feel Like?

If you want a cool-to-the-touch mattress, the C4 mattress is the best option because its gel-infused foam allows extra cooling benefits. For air-like mattress lovers that keep their body lifted on top of the mattress, both C2 and C4 are best for you. They have customizable firmness options that are great for people who like to toss and turn when sleeping.

What’s It Like to Sleep on the C2 & C4 Mattresses?

Back and stomach sleepers will have the top quality sleep in both mattresses because it offers enough cooling sensation and a support mechanism for these sleeping positions. However, side sleepers may choose a different mattress type from Sleep Number if they wish for a more supportive mattress, especially for those who want pressure relief.

The Sleep Number 360 C2 vs. C4 Mattresses By Body Type

Sleep Number 360 C2 Performance By Body Type & Sleeping Position:

Body Type:BACK SLEEPERSSTOMACH SLEEPERSSIDE SLEEPERS
Lightweight (< 130 lbs):  5 5 5
Average-weight (130–230 lbs): 3 3 5
Heavyweight (> 230 lbs):  2 2 2

Sleep Number 360 C4 Performance By Body Type & Sleeping Position:

Body Type:BACK SLEEPERSSTOMACH SLEEPERSSIDE SLEEPERS
Lightweight (< 130 lbs):  5 5 5
Average-weight (130–230 lbs): 3 3 5
Heavyweight (> 230 lbs):  3 3 3

1 = Very poor, 2 = Not good, 3 = Fair, 4 = Good, 5 = Excellent

Average-Weight Sleepers (130–230 lbs)

Average-weight back sleepers will find both mattresses comfortable. The best thing about these mattresses is the ability to customize the firmness due to their air chambers with remote control functionalities. Besides, average-weight stomach sleepers will enjoy how soft and airy these mattresses are, making sleep more comforting and relaxing.

Heavyweight Sleepers (> 230 lbs)

If you are a heavyweight sleeper, the Classic series of Sleep Number, such as the C2 and C4, might not be your best option. Chances are, you will not get the proper support, so you probably won’t feel comfortable on either bed. C2 and C4 mattresses are also not best for side sleepers since they can be too firm for this sleeping position.

Lightweight Sleepers (< 130 lbs)

Lightweight combination sleepers will experience the best mattress feel when sleeping in these air-chambered mattresses. You can toss and turn without worrying about getting body aches in the morning. Back and stomach sleepers may also experience comfortable and relaxing sleep without pressure issues in both mattresses.

Differences In Mattress Construction 

Sleep Number 360 C2 is an 8” inch mattress while C4 is 9” slightly bigger. Both mattresses are smaller than the standard mattress size but still offer top-of-the-line mattress construction.

Sleep Number 360 C2 Mattress Materials Sleep Number 360 C4 Mattress Materials
Poly BlendPoly Blend
2″ Gel-Infused Polyfoam3″ Gel-Infused Polyfoam
Air ChambersAir Chambers

Cover

The C2 comprises a 6-inch air chamber layer and a 2-inch top comfort layer of gel-infused foam. At the same time, C4 has a 3-inch layer for added comfort.

Comfort Layers

The comfort layer of the C4 is zoned to provide different levels of firmness in strategic areas, making it less thick in the hip and shoulder areas and denser in the neck and lower back areas to provide targeted support.

Support Layers

Both C2 and C4 have base layers for more durable support on their mattresses.

Sleep Number 360 C2 vs. C4 Pricing

SizeC2 PricesC4 Prices
Twin$699.00$
Twin XL$799.00$
Full$899.00$
Queen$1099.00$1899.00
King$1599.00$2399.00
California King$1599.00$2399.00

Sleep Number 360 C2 vs. C4 Mattress Performance Ratings & Differences

In this section, let us compare Sleep Number’s C2 and C4 mattresses to choose the best option for your sleeping habits.

Temperature

While both mattresses have a standard dual air chamber and C4 has a gel-infused foam for extra cooling benefits, it might not serve best for those who excessively sweat when sleeping. Hot sleepers might not get the best cooling effect, but it provides additional cooling benefits to the mattress.

Motion Transfer

With dual-air chamber foam, C2 and C4 are known to be effective for couples and combination sleepers. They can customize the firmness level on each side, tailoring what you need throughout your sleep.

Edge Support 

Light to average-weight sleepers may find C2 and C4 effective for edge support due to their dual standard air chambers that extend all the way to the edges. As a result, edge support might not be an issue for sleepers who weigh below 230 lbs.

Pressure Relief 

Mattresses in the classic line have a Responsive Air feature that adds or removes air to conform to your changing body shape while you sleep. It enables back and stomach sleepers to sleep comfortably without pressure issues.

Pain Relief 

While both mattresses can be a perfect match for light and average-weight sleepers, they might not serve heavyweight sleepers well, especially if they are experiencing pain. C2 and C4 are perfect for keeping sleepers comfortable and well-rested throughout the night with foam material that can help cushion pressure points.

Durability 

Sleep Number adheres to the standard policy of giving a 100-day trial period. On top of that, they have a 15-year limited warranty, which entails sturdy and durable mattresses.

Shipping, Returns, & Warranties 

Sleep Number 360 C2 

Sleep Number mattress providers offer their mattresses with different shipping costs, depending on which state you are in. It allows a 100-sleep trial period which you can return with a full refund. It has a 15-year limited warranty with repair inclusions for the first year.

Sleep Number 360 C4

Like the C2 mattress, C4 shipping can also vary, depending on which state you want it shipped to. You can indulge in sleeping in this mattress with a 100-sleep trial period with the chance to get a full refund if you wish to send it back to them. It also has a 15-year limited warranty, including repairs for free within the first year.

Other Models Available

Product
Firmness
Score
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Sleep Number 360 i10 Smart Mattress
Multiple firmness options
4.1/5
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Sleep Number 360 i8 Smart Mattress
Multiple firmness options
4.3/5
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Sleep Number 360 m7 Smart Mattress
Multiple firmness options
4.7/5
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Sleep Number 360 p5 Smart Mattress
Multiple firmness options
4.7/5
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Product
Sleep Number 360 i10 Smart Mattress
Firmness
Multiple firmness options
Score
4.1/5
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Product
Sleep Number 360 i8 Smart Mattress
Firmness
Multiple firmness options
Score
4.3/5
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Product
Sleep Number 360 m7 Smart Mattress
Firmness
Multiple firmness options
Score
4.7/5
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Product
Sleep Number 360 p5 Smart Mattress
Firmness
Multiple firmness options
Score
4.7/5

Our Final Take

C2 and C4 mattresses from the Classic Series of Sleep Number are best for light- to average-weight back and stomach sleepers. However, heavyweight sleepers, especially those who tend to get hot and are side sleepers, might need more support from these mattresses. The C2 is the cheaper option, but the C4 comes with an additional layer of foam.

Sleep Number 360 C2 & C4 FAQs

What are the typical problems with the Sleep Number Mattresses?

Customers’ typical response to Sleep Number Mattresses is that they sag over time and have technical issues with their smart and innovative mattresses. You can contact Sleep Number’s customer service since these problems are included in your 15-year limited warranty.

Are firmer mattresses always better?

The best part of having either C2 or C4 is the Dual Air-Chambers that allow you to sleep on the mattress on your preferred firmness option. It is best for couples who have different takes on firmness levels. Depending on your preference, a firmer mattress might either be good or bad.

Is the Classic Series the best option for mattresses from Sleep Number?

The Classic series is the most budget-friendly mattress from Sleep Number. It is best for stomach sleepers since you will have an elevated feel, aligning your spine. However, multiple Sleep Number Mattresses will surely fit your need better than the Classic series.