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Sleep Number c4 Facts: 117 Specifications & 18 Highlights

From bedtime comfort to build quality, this mattress has 117 reasons to check it out — starting with general information, dimensions & weight, comfort & firmness & construction & materials and more.

18 Points
Sleep Number
Sleep Number
Sleep Number c4
Sleep Number c4

Highlights 18

No extras. Just what matters.
18 Points

Why is Sleep Number c4 better than other mattresses ?

General Information

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Dimensions & Weight

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Comfort & Firmness

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Construction & Materials

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Performance & Durability

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Comparisons 2

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Quick Take

The essentials that matter—nothing extra

A fast snapshot of the Sleep Number c4, covering its standout specification and what you can expect right out of the box.

Sleep Number c4
Sleep Number c4

Sleep Number c4 features a 10-inch profile mattress. It is built around the fundamental DualAir technology for individualized firmness settings on each side. The mattress is also integrated with SleepIQ Technology for sleep tracking.

Specifications & Facts 117

Specs measured. Drama avoided.

Need more than marketing buzzwords? This Sleep Number c4 mattress review explores price, features, comfort, and how it compares to other mattresses out there.

General Information 10

Sleep Number c4 Model Name

What is the model name?

63 Sleep Number c4 0 Votes C4

68 Mattresses in this range Hybrid

Provides the marketing name used by the brand.

Sleep Number c4 Warranty Period

What is the warranty period?

53 Sleep Number c4 0 Votes 15 Years

62 Mattresses in this range 10 Years

Duration of warranty coverage.

Sleep Number c4 Mattress Type

What is the mattress type?

53 Sleep Number c4 0 Votes Air

40 Mattresses in this range Hybrid

Categorizes construction type.

Sleep Number c4 Product Type

What type of mattress is it?

78 Sleep Number c4 0 Votes Airbed

67 Mattresses in this range Hybrid

Defines the fundamental mattress category.

Sleep Number c4 Release Year

What is the release year?

53 Sleep Number c4 0 Votes 2017

81 Mattresses in this range 2024

Indicates when the product was introduced to the market.

Sleep Number c4 Country of Manufacture

Where is the mattress manufactured?

73 Sleep Number c4 0 Votes USA

73 Mattresses in this range USA

Shows where the mattress is manufactured.

Dimensions & Weight 15

Sleep Number c4 Mattress Size

What is the mattress size?

0 Sleep Number c4 0 Votes Queen, King, Cal King, Split King

47 Mattresses in this range Twin, Twin XL, Full, Queen, King, Cal King

Identifies the size for the mattress.

Sleep Number c4 Width (Queen)

What is the Queen mattress width?

60 inch 0 Votes
Sleep Number c4
59.54 inch (Average)

Standard width for Queen size mattress.

Sleep Number c4 Width (King)

What is the King mattress width?

76 inch 0 Votes
Sleep Number c4
73.93 inch (Average)

Standard width for King size mattress.

Sleep Number c4 Width (California King)

What is the Cal King mattress width?

72 inch 0 Votes
Sleep Number c4
72.01 inch (Average)

Standard width for California King mattress.

Sleep Number c4 Width (Split King)

What is the Split King mattress width?

76 inch 0 Votes
Sleep Number c4
55.29 inch (Average)

Combined width of two Twin XL mattresses.

Sleep Number c4 Height (Queen)

What is the Queen mattress height?

9 inch 0 Votes
Sleep Number c4
12.3 inch (Average)

Standard thickness range for Queen mattresses.

Comfort & Firmness 13

Sleep Number c4 Motion Isolation Rating

What is the motion isolation rating?

73 Sleep Number c4 0 Votes 8/10

72 Mattresses in this range 8/10

Sleep Number c4
Sleep Number c4

With a strong rating of 8/10, this mattress is great for couples, minimizing motion transfer so that movements from one sleeper won’t disturb the other. This is ideal for light sleepers or partners with differing schedules.

Measures how well the mattress prevents motion transfer.

Sleep Number c4 Edge Support Rating

What is the edge support rating?

60 Sleep Number c4 0 Votes 8/10

58 Mattresses in this range 8/10

Sleep Number c4
Sleep Number c4

The mattress features reinforced foam edges that help prevent sagging and make sitting on the edge of the bed more stable. It also allows you to use the entire surface of the mattress without feeling like you’re rolling off.

Indicates stability around the mattress edges.

Sleep Number c4 Cooling Technology

What cooling technology is included?

69 Sleep Number c4 0 Votes Gel-Infused Foam

66 Mattresses in this range Bamboo, Open Cell Foam

Sleep Number c4
Sleep Number c4

The gel-infused foam in the comfort layer helps dissipate body heat, keeping you cooler throughout the night. This is especially useful for hot sleepers or those who experience temperature fluctuations during sleep.

GDescribes specific cooling methods used.

Sleep Number c4 Comfort Layer Thickness

What is the comfort layer thickness?

1.5 inch 0 Votes
Sleep Number c4
4.04 inch (Average)

Sleep Number c4
Sleep Number c4

The 1.5-inch comfort layer is made of polyurethane foam, offering moderate cushioning while still maintaining a firm feel. It’s a good option for sleepers who want minimal plushness but still need pressure relief. About 3.8 cm thick.

Thickness of the comfort layer on top.

Sleep Number c4 Zoned Support

Does the mattress include zoned support?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Sleep Number c4
Sleep Number c4

The three-zone comfort layer provides targeted support for the head, neck, back, and hips, ensuring proper spinal alignment. This is especially beneficial for side sleepers who need extra support at their pressure points.

Indicates if the mattress offers different support zones.

Sleep Number c4 Firmness Level

What is the firmness level?

43 Sleep Number c4 0 Votes Firm

54 Mattresses in this range Medium

Describes the general firmness category.

Construction & Materials 12

Sleep Number c4 Mattress Core Material

What is the core material?

68 Sleep Number c4 0 Votes Air Chambers

43 Mattresses in this range Foam

Sleep Number c4
Sleep Number c4

The air chamber system is the heart of Sleep Number beds, allowing you to adjust the firmness on each side of the bed independently. This feature makes the C4 a great choice for couples with different sleep preferences.

Defines the main support structure.

Sleep Number c4 Comfort Layer Material

What is the comfort layer material?

0 Sleep Number c4 0 Votes Polyurethane Foam

45 Mattresses in this range Memory Foam

Sleep Number c4
Sleep Number c4

The polyurethane foam in the comfort layer provides a slight cushioning feel while still allowing for the firmness of the air chambers to shine through. It helps alleviate pressure without feeling too soft.

Materials used in the comfort layers.

Sleep Number c4 Cover Material

What is the cover material?

0 Sleep Number c4 0 Votes Polyester

43 Mattresses in this range Organic Cotton

Sleep Number c4
Sleep Number c4

The polyester cover is breathable, allowing for airflow that helps keep the mattress cooler during sleep. It’s durable and easy to clean with spot cleaning recommended for minor spills.

Materials used for the outer cover.

Sleep Number c4 Flame Retardant Material

What flame retardant is used?

0 Sleep Number c4 0 Votes Natural Wool

37 Mattresses in this range Natural Wool

Sleep Number c4
Sleep Number c4

The use of natural wool as a flame retardant material is an eco-friendly choice that’s both safe and sustainable. Wool is a natural material that also helps regulate temperature, keeping you comfortable through the night.

Material used to meet fire safety standards.

Sleep Number c4 Reinforced Edge Material

What is the reinforced edge material?

0 Sleep Number c4 0 Votes Foam

40 Mattresses in this range High-Density Foam

Sleep Number c4
Sleep Number c4

The foam edge reinforcement ensures that the mattress maintains its shape over time, preventing sagging and providing better support for getting in and out of bed.

Material reinforcement along the edges.

Sleep Number c4 Removable / Washable Cover

Does it have a removable and washable cover?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Sleep Number c4
Sleep Number c4

The cover can be removed for spot cleaning, which is great for maintaining the mattress’s cleanliness. It’s not machine-washable, but the ability to clean it by hand is still a major convenience.

Indicates if the cover can be removed and washed.

Performance & Durability 11

Sleep Number c4 Expected Lifespan

What is the expected lifespan?

15 Years 0 Votes
Sleep Number c4
10.36 Years (Average)

Sleep Number c4
Sleep Number c4

With a lifespan of 15 years, this mattress is designed to provide consistent comfort and support for the long haul, ensuring you won’t need to replace it any time soon.

Average years the mattress is designed to last.

Sleep Number c4 Sag Resistance Rating

What is the sag resistance rating?

0 Sleep Number c4 0 Votes Medium

41 Mattresses in this range Medium

Sleep Number c4
Sleep Number c4

This rating suggests that while the mattress will resist sagging over time, heavier individuals may want to pay extra attention to their Sleep Number settings to avoid excessive compression.

Rates the mattress resistance to sagging.

Sleep Number c4 Memory Foam Recovery Time

What is the recovery time of the foam?

5 sec 0 Votes
Sleep Number c4
3.14 sec (Average)

Time it takes memory foam to return to shape.

Sleep Number c4 Density Rating

What is the density rating?

0 Sleep Number c4 0 Votes Medium

39 Mattresses in this range Medium

Foam density that indicates durability and support.

Sleep Number c4 Indentation Load Deflection (ILD)

What is the ILD value?

0 Sleep Number c4 0 Votes Medium

42 Mattresses in this range Medium (20–30 lbs)

Measures foam firmness by required load to indent.

Sleep Number c4 Rotatable Design

Can the mattress be rotated?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if mattress can be rotated to extend life.

Comfort Adjustability 9

Sleep Number c4 Adjustable Base Compatibility

Is it compatible with adjustable bases?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Sleep Number c4
Sleep Number c4

The mattress is compatible with Sleep Number’s adjustable bases, which allow for customizable head and foot elevation. This is ideal for reading, watching TV, or improving circulation while sleeping.

Indicates if mattress can be used with an adjustable bed base.

Sleep Number c4 Dual Firmness Option

Does it offer dual firmness?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Sleep Number c4
Sleep Number c4

The Dual Firmness option allows each sleeper to adjust their side of the mattress to their preferred firmness, making it perfect for couples with different sleeping preferences.

Indicates if mattress offers two firmness levels in one design.

Sleep Number c4 Split Mattress Option

Is it available in split design?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Shows if mattress can be split into two sides.

Sleep Number c4 Removable Top Layer

Does it have a removable top layer?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if the top comfort layer can be removed or swapped.

Sleep Number c4 Modular Layer Design

Does it have modular layers?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Allows layers to be rearranged for customized comfort.

Sleep Number c4 Customizable Firmness Inserts

Does it support firmness inserts?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Supports inserts or pads to adjust firmness.

Health & Safety 9

Sleep Number c4 CertiPUR-US Certified

Is it CertiPUR-US certified?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Shows if foams meet CertiPUR-US safety standards.

Sleep Number c4 GREENGUARD Gold Certified

Is it GREENGUARD Gold certified?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates compliance with low chemical emissions.

Sleep Number c4 OEKO-TEX Certified

Is it OEKO-TEX certified?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Ensures textiles are free from harmful substances.

Sleep Number c4 Formaldehyde Free

Is the mattress formaldehyde free?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if product is free from formaldehyde chemicals.

Sleep Number c4 Chemical-Free Fire Barrier

Does it use a chemical-free fire barrier?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Fire safety protection without chemical sprays.

Sleep Number c4 Low VOC Emission

Does it have low VOC emission?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Ensures mattress has low volatile organic compound emissions.

Temperature & Climate 8

Sleep Number c4 Cooling Gel Infusion

Does it have cooling gel infusion?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if cooling gel is infused in foam layers.

Sleep Number c4 Phase Change Material

Does it use phase change materials?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Shows if mattress uses phase-change materials for temperature control.

Sleep Number c4 Breathable Cover

Does it have a breathable cover?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if the outer cover allows airflow.

Sleep Number c4 Moisture-Wicking Fabric

Does it use moisture-wicking fabric?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Ensures cover or material draws away sweat and moisture.

Sleep Number c4 Heat Dissipation Rating

What is the heat dissipation rating?

0 Sleep Number c4 0 Votes Good

40 Mattresses in this range Good

Rates how well mattress disperses heat.

Sleep Number c4 Climate Adaptability

Is it climate adaptable?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if mattress adapts to various climates.

Seating & Capacity 8

Sleep Number c4 Seating Capacity

What is the seating capacity?

0 Sleep Number c4 0 Votes 2 adults

38 Mattresses in this range 2 adults

Maximum number of people the mattress is designed to seat or sleep.

Sleep Number c4 Maximum Weight Capacity

What is the maximum weight capacity?

400 lbs 0 Votes
Sleep Number c4
479.23 lbs (Average)

Maximum supported body weight.

Sleep Number c4 Couple Friendly Design

Is it couple friendly?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if mattress minimizes motion transfer and supports two sleepers.

Sleep Number c4 Edge Sitting Comfort Rating

What is the edge sitting comfort rating?

0 Sleep Number c4 0 Votes Good

41 Mattresses in this range Good

Rates how comfortable and stable the edge feels when sitting.

Sleep Number c4 Bunk Bed Compatibility

Is it compatible with bunk beds?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if mattress is safe to use on bunk beds.

Sleep Number c4 Child / Toddler Suitability

Is it suitable for children or toddlers?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Shows if the mattress is safe for children or toddlers.

Travel & Portability 7

Sleep Number c4 Quick Expansion Time After Unboxing

What is the quick expansion time?

24 hrs 0 Votes
Sleep Number c4
23.79 hrs (Average)

Time needed for mattress to reach full shape after opening.

Sleep Number c4 Roll Pack / Bed-in-Box Design

Is it a roll pack or bed-in-box design?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if the mattress is compressed and rolled into a box for shipping.

Sleep Number c4 Easy Transport Handles

Does it have transport handles?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Shows if mattress includes sewn-in handles for moving.

Sleep Number c4 Foldable Design

Is it foldable?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if mattress can be folded for storage or portability.

Sleep Number c4 Vacuum-Sealed Packaging

Does it use vacuum-sealed packaging?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Describes whether mattress is vacuum sealed for delivery.

Sleep Number c4 Storage Bag

Is a storage bag included?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Shows if mattress comes with a bag for storage or moving.

Technology & Smart Features 8

Sleep Number c4 Smart Sensor Connectivity

Does it connect with smart sensors?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Sleep Number c4
Sleep Number c4

The smart sensors in the mattress allow it to communicate with the SleepIQ app, providing insights into your sleep quality and giving you personalized recommendations for better rest.

Shows if mattress can connect with external smart sensors.

Sleep Number c4 Sleep Tracking Integration

Does it integrate with sleep tracking?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if mattress integrates with sleep tracking systems.

Sleep Number c4 App Connectivity

Does it have app connectivity?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if mattress has an app for customization or tracking.

Sleep Number c4 USB Charging Port

Does it have USB charging ports?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Shows if mattress includes built-in USB charging ports.

Sleep Number c4 Wireless Control

Does it have wireless control?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if features can be controlled wirelessly.

Sleep Number c4 Smart Home Compatibility

Is it smart home compatible?

Yes 0 Votes Sleep Number c4

Yes Mattresses in this range

Shows if mattress works with Alexa, Google Home, etc.

Environmental & Sustainability 7

Sleep Number c4 Recyclable Materials

Does it use recyclable materials?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if mattress materials can be recycled.

Sleep Number c4 Sustainable Sourcing

Is it sustainably sourced?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Shows if materials come from responsibly managed sources.

Sleep Number c4 Carbon Neutral Production

Is it carbon neutral in production?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if manufacturer offsets or eliminates carbon emissions.

Sleep Number c4 Biodegradable Components

Does it include biodegradable components?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Shows if components naturally break down after disposal.

Sleep Number c4 Renewable Energy Manufacturing

Is it manufactured with renewable energy?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Indicates if renewable energy is used in production.

Sleep Number c4 Take-Back / Recycling Program

Does it have a take-back program?

No 0 Votes Sleep Number c4

Yes Mattresses in this range

Shows if brand offers a recycling or buy-back program.

Surveys

Because hot takes deserve votes.

Sleep Number c4 Comfort Level

How comfortable is this mattress for everyday use?

Super comfy — Feels like sleeping on a cloud 0 Votes
Pretty comfortable — Good for most sleep positions 0 Votes
Decent comfort — Works for short naps 0 Votes
A bit too firm — Not very cozy 0 Votes
Hard and uncomfortable — Feels stiff all night 0 Votes

Sleep Number c4 Durability

How long does this mattress last before showing wear and tear?

Extremely durable — Over 12 years 0 Votes
Long lasting — 9 to 12 years 0 Votes
Good durability — 6 to 8 years 0 Votes
Moderate lifespan — 3 to 5 years 0 Votes
Very short lifespan — Less than 3 years 0 Votes

Sleep Number c4 Firmness

How firm does this mattress feel when lying down?

Extra firm — Very rigid and supportive 0 Votes
Firm — Strong support with little sink 0 Votes
Medium — Balanced support and softness 0 Votes
Soft — Gently cushioned 0 Votes
Ultra soft — Sinks in deeply 0 Votes

Sleep Number c4 Motion Isolation

How well does this mattress reduce movement transfer at night?

Excellent — Barely feel any motion 0 Votes
Good — Only strong shifts are felt 0 Votes
Decent — Minor movements are felt 0 Votes
Somewhat poor — Frequent disturbance 0 Votes
Very poor — Every movement is noticeable 0 Votes

Sleep Number c4 Thickness

How thick is this mattress in height?

Extra thick — Over 15 inches 0 Votes
Thick — 13 to 15 inches 0 Votes
Medium — 10 to 12 inches 0 Votes
Thin — 6 to 9 inches 0 Votes
Very thin — Less than 6 inches 0 Votes

Sleep Number c4 Temperature Regulation

How well does this mattress stay cool at night?

Very cool — Always stays fresh 0 Votes
Cool — Feels comfortable most nights 0 Votes
Average — Neutral temperature 0 Votes
Somewhat warm — Gets a little stuffy 0 Votes
Very hot — Traps a lot of heat 0 Votes

Sleep Number c4 Ease of Setup

How easy was it to set up this mattress at home?

Super simple — Done in no time 0 Votes
Pretty easy — Quick setup without stress 0 Votes
Manageable — Took some effort but fine 0 Votes
A bit difficult — Needed extra help 0 Votes
A total hassle — Took forever to set up 0 Votes

Sleep Number c4 Design Appeal

How attractive does this mattress look in a bedroom?

Beautiful design — Looks high-end 0 Votes
Stylish — Adds to the room look 0 Votes
Decent — Matches most rooms 0 Votes
Okay — Nothing special 0 Votes
Plain and boring — Looks cheap 0 Votes

Sleep Number c4 Pricing

How would you rate the price of this mattress?

Great value for money 0 Votes
Pretty good price 0 Votes
Fair deal 0 Votes
Kinda pricey 0 Votes
Crazy expensive 0 Votes

Sleep Number c4 Edge Support Strength

How sturdy are the edges of this mattress when sitting or lying near the side?

Excellent edge strength — No sinking at all 0 Votes
Strong edge support — Slight compression only 0 Votes
Moderate edge support — Noticeable sinking 0 Votes
Weak edge support — Feels unstable at sides 0 Votes
Very weak — Collapses when sitting on edge 0 Votes

Reviews 0

The good, the bad, and the brutally honest.

Average Rating

Sleep Number
Sleep Number
Sleep Number c4
Sleep Number c4
0 / 5 0 Reviews

Discussions 0

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Awards 0

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