Sleep Sage editorial team · 500+ sleep products reviewed since launch
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Sleep Number ComfortNext Ultra
Maximum relief and cooling in the ComfortNext line
We publish a number only when supported by documented measurements. This review evaluates published specifications and policies.
34 customer reviews on SleepNumber's website
Queen price on record
Warranty
15 years
Trial Period
100 nights
Shipping
In-home delivery
Height
14 inches
Our verdict
The ComfortNext Ultra is the top of the ComfortNext collection — 14 inches of Sleep Number's most advanced non-Climate technology. It delivers maximum pressure relief for hips, shoulders, knees, and lower back, with 175% more built-in cooling materials than the ComfortMode and maximum airflow design. The "Ultra support" designation means denser, more substantial foam layers surrounding the air chambers. At $4,499, it's just $500 below the ClimateCool, making the value proposition interesting — you get nearly all the comfort without the active heating/cooling of the Climate series.
Verdict & testing evidence
Research Evaluation- Evidence type
- Research Evaluation
- In-person experience
- Not established for this exact model
- Published firmness
- 5/10 in our product record (not a lab result)
- Lab performance data
- No documented lab measurements
Product-gallery photos and manufacturer specifications are not independent test measurements. We do not assign numerical cooling, motion, pressure or durability scores without documented evidence.Editorial policy.
Sleep Number ComfortNext Ultra Overview
The Sleep Number ComfortNext Ultra is a 14-inch premium smart bed at $4,499 with maximum pressure relief, 175% more cooling than ComfortMode, and ultra-dense comfort layers. The top of the ComfortNext collection.
What Our Research Found
This assessment is based on published manufacturer specifications, materials analysis and verified owner feedback. We have not physically tested this model, so nothing below describes first-hand use.
The ComfortNext Ultra is Sleep Number's maximum non-Climate offering. At 14 inches and $4,499, it's thick, luxurious, and packed with their best comfort technology — minus the active heating/cooling of the Climate series.
Interesting value consideration: the ClimateCool starts at $4,949, just $450 more. If active cooling is important to you, the ClimateCool might be the better buy. But if you want maximum comfort layer thickness and don't need aggressive cooling, the Ultra delivers.
Performance assessment
How we score (1–10 rubric) →Evaluated through published specifications, manufacturer information and materials analysis. Not physically tested in our lab. We do not publish cooling, motion-isolation, edge-support, pressure-relief, response, durability or off-gassing scores for the Sleep Number ComfortNext Ultra until the full protocol is complete. Everything below — construction, materials, firmness, pricing, trial and warranty — is verified specification and editorial analysis.
Research evaluation — full lab score pending
The Sleep Number ComfortNext Ultra has been evaluated from published specifications, manufacturer data, materials analysis and verified owner feedback. It has not been through our lab. Rather than publish estimated numbers, we leave this table empty and publish no Sleep Sage performance scores until the measurements exist.
Firmness Level
Medium Soft (5/10)
What We Love
- Maximum pressure relief across all zones
- 175% more cooling than ComfortMode
- 14-inch premium profile
- Ultra-dense comfort layers
- Maximum airflow engineering
- Active temperature control
What Could Be Better
- $4,499 — approaching Climate series pricing
- No active heating like Climate360
- Complexity of air chamber system
- Electricity dependent
Best For
- Those wanting maximum comfort without Climate pricing
- Couples with significant pain who need deep pressure relief
- Hot sleepers wanting passive + active cooling
- Heavier sleepers who need substantial comfort layers
Not Ideal For
- Those who should consider the ClimateCool for $450 more
- Budget shoppers
- Those wanting active heating capabilities
Mattress Construction
Maximum Cooling Cover
175% more cooling materials with maximum airflow
Ultra Pressure Relief System
Maximum-density foam for full-body relief
Active Temperature Control
Climate regulation technology
Dual Air Chambers
0-100 adjustable firmness per side
Ultra Support Base
Reinforced high-density foundation
Sleep Position Analysis
Side Sleepers
The Sleep Number ComfortNext Ultra's softer feel (5/10) may provide more cushioning for side sleepers.
Back Sleepers
The Sleep Number ComfortNext Ultra's listed firmness of 5/10 may suit back sleepers seeking a medium-to-firm surface. Spinal alignment and hip support have not been objectively measured for this model unless documented test results appear above.
Stomach Sleepers
At 5/10 firmness, the Sleep Number ComfortNext Ultra may be too soft for stomach sleepers. Stomach sleepers may want to compare a firmer model, especially if they notice uncomfortable hip sinkage.
Combination Sleepers
The Sleep Number ComfortNext Ultra is an adjustable airbed, so responsiveness depends on the pressure you set rather than on foam or coils. Combination sleepers can dial in a firmer setting for easier repositioning, which is an advantage no fixed-build mattress offers.
Which Sleep Number ComfortNext Ultra Model Should You Buy?
The ComfortNext Ultra is the top of the ComfortNext line — the deepest pressure-relief stack Sleep Number builds before the flagship climate models, over the standard dual-air core with active cooling.
| Model | Firmness | Best for | Queen |
|---|---|---|---|
| ComfortNext Ultra | Adjustable | Luxury buyers below flagshipThe plushest ComfortNext. Best for heavier side sleepers. | $4,499 |
| ComfortNext Lux | Adjustable | Side sleepersMost buyers' sweet spot in the line. | $3,999 |
| ComfortNext | Adjustable | Value buyersCore tech at the entry price. | $2,999 |
| Climate360 | Adjustable | The full climate systemActive heating and cooling, both sides. | $6,999 |
Sleep Number ComfortNext Ultra Prices by Size
Retail pricing with seasonal event discounts; the FlexFit base adds $300–$1,000. At this tier, compare the total against the Climate360 before buying.
| Size | Dimensions | List price | Typical sale price |
|---|---|---|---|
| Twin XL | 38" x 80" | $3,799 | $3,799 |
| Full | 53" x 75" | $4,099 | $4,099 |
| Queen | 60" x 80" | $4,499 | $4,499 |
| King | 76" x 80" | $5,199 | $5,199 |
Prices were read from the brand's own site when this review was last updated and change with promotions, so confirm the price at checkout. See our current mattress deals hub for live discounts.
Sleep Number ComfortNext Ultra vs. the Alternatives
Sleep Number ComfortNext Ultra vs. Sleep Number Climate360
$6,999 queenChoose the Sleep Number ComfortNext Ultra if: You want maximum cushion with cooling and can skip the warming feature.
Choose the Sleep Number Climate360 if: You want the complete active climate system on both sides.
Read the full Sleep Number ComfortNext Ultra vs. Sleep Number Climate360 comparison →Sleep Number ComfortNext Ultra vs. Tempur-Pedic LuxeBreeze
$4,999 queenChoose the Sleep Number ComfortNext Ultra if: You need dual-firmness adjustability for two sleepers.
Choose the Tempur-Pedic LuxeBreeze if: You want the strongest passive cooling in memory foam.
Read the full Sleep Number ComfortNext Ultra vs. Tempur-Pedic LuxeBreeze comparison →Sleep Number ComfortNext Ultra vs. Eight Sleep Pod 4 Ultra
$4,699 + subscriptionChoose the Sleep Number ComfortNext Ultra if: You want air-chamber adjustability and no subscription.
Choose the Eight Sleep Pod 4 Ultra if: You want more powerful cooling and integrated base articulation.
Read the full Sleep Number ComfortNext Ultra vs. Eight Sleep Pod 4 Ultra comparison →The case for the Ultra
Heavier side sleepers — roughly 200 pounds and up — compress through thinner comfort stacks and end up resting partly on the air chamber. The Ultra's ultra-deep relief system is built for exactly that body type, and it's the only ComfortNext we'd recommend above that weight for dedicated side sleepers.
Lighter sleepers and back sleepers are buying cushion they won't use; the Lux is the rational choice there.
Ultra versus Climate360: the real decision
At $4,499 against $6,999, the question is whether the Climate360's warming function and dual-zone active climate are worth $2,500. For cold sleepers and couples with opposite temperature needs, it often is. For everyone else, the Ultra covers cooling-plus-cushion at a meaningfully lower price.
Note that the Climate360 also integrates its base, so compare total system prices rather than mattress stickers.
Sleep Number ComfortNext Ultra Buyer Questions
What People Cross-Shop Against the Sleep Number ComfortNext Ultra
The five beds closest to the Sleep Number ComfortNext Ultra on price, firmness and build in our catalog — and the one thing each does differently. These are research evaluations, so no numeric ratings are shown (why).
Tempur-Pedic TEMPUR-breeze° is a nearby alternative by price, firmness and construction. Compare the verified specifications, policies and evaluation method before choosing.
Technogel Favola 3.0 is a nearby alternative by price, firmness and construction. Compare the verified specifications, policies and evaluation method before choosing.
Avocado Luxury Organic is a nearby alternative by price, firmness and construction. Compare the verified specifications, policies and evaluation method before choosing.
King Koil Reserve Luxury is a nearby alternative by price, firmness and construction. Compare the verified specifications, policies and evaluation method before choosing.
Purple RejuvenatePlus is a nearby alternative by price, firmness and construction. Compare the verified specifications, policies and evaluation method before choosing.
Want a different pairing? Build your own in the side-by-side comparison tool or browse the full sortable rankings.
Sleep Number ComfortNext Ultra Current Price
Queen pricing. List price $4,499, currently advertised at $4,499.
Frequently Asked Questions
Common Themes in Owner Reviews
34 customer reviews on SleepNumber's website. Owner feedback summarized from published customer reviews on SleepNumber's website and major retailer listings. SleepSage cannot verify individual purchases, so no purchase-verified badge is shown. Common themes in owner reviews of the Sleep Number ComfortNext Ultra line up with the points below. We summarise recurring praise and complaints rather than republishing individual reviews, reviewer names, dates or helpful-vote counts, because those belong to the retailer and we cannot verify them here.
Praised most often
- Maximum pressure relief across all zones
- 175% more cooling than ComfortMode
- 14-inch premium profile
- Ultra-dense comfort layers
- Maximum airflow engineering
Most common complaints
- $4,499 — approaching Climate series pricing
- No active heating like Climate360
- Complexity of air chamber system
- Electricity dependent
Verified owner reviews written by Sleep Sage readers appear separately and are attributed to real accounts.
Quick Specs
- Type
- Air Chamber Hybrid
- Firmness
- Medium Soft
- Height
- 14 inches
- Trial
- 100 nights
- Warranty
- 15 years
How We Researched the Sleep Number ComfortNext Ultra
This is a research evaluation. We have not put the Sleep Number ComfortNext Ultra through our physical lab protocol, so this page describes verified construction, manufacturer specifications, policies, comparative analysis and published owner feedback.
Research Evaluation: This mattress has not completed our physical lab testing protocol, and we publish no Sleep Sage lab measurements for it. Our evaluation is based on verified construction, manufacturer specifications, policies, comparative analysis and available owner feedback.
Construction & Materials Review
We document the mattress's published layer construction, materials, densities and cover fabrics from manufacturer specifications and supporting documentation.
Specification & Certification Verification
We check published specifications, certifications and material claims against the manufacturer's own documentation, and flag anything we cannot confirm.
Policy & Price Verification
Trial length, return terms, warranty coverage, shipping and current pricing are recorded from the retailer and re-checked when we update the review.
Owner Feedback Synthesis
We summarise recurring themes in published owner feedback rather than republishing individual reviews, names or vote counts.
Comparative Analysis
We position the mattress against comparable models we have measured, using construction similarities — never by assigning it measurements it does not have.
What We Have Not Done
No documented pressure mapping, thermal logging, motion-transfer, edge-deflection or durability measurements are available for this unit. We publish no lab scores until they are.
Editorial transparency: Ben Trapskin owns Yawnder, a mattress retailer, and Sleep Sage may earn commissions from qualifying purchases. Retail and affiliate relationships do not substitute for independent measurement evidence. We identify which observations are firsthand and which claims come from manufacturer sources. Read our full editorial policy and detailed testing methodology.
Owner Reviews
Real opinions from Sleep Number ComfortNext Ultra owners. 0 reviews
Related Articles & Guides
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How Sleep Number ComfortNext Ultra compares
Side-by-side breakdowns we've published featuring Sleep Number.
Related Mattresses
Relevant Guides
More on Sleep Number and its closest rivals
Brand-level context for this review: Sleep Number's construction philosophy, pricing bands, trial and warranty terms, plus the competitors we cross-shopped it against.
- Sleep Number review & brand guideAir-chamber beds with adjustable firmness per side, formerly Select Comfort.Queen $1,099–$5,999 · 100-night trial
- Tempur-Pedic review & brand guideThe original viscoelastic foam mattress brand, born from NASA tech.Queen $2,099–$6,499 · 90-night home trial
- Saatva review & brand guideLuxury innerspring and hybrid mattresses sold direct.Queen $1,395–$2,995 · 365-night home trial
- Beautyrest review & brand guideSimmons' pocketed-coil flagship, from mainstream Beautyrest to Beautyrest Black.Queen $699–$3,499 · Varies by retailer (commonly 100–120 nights)
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