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Sleep Number
Sleep Number ComfortNext Ultra
Maximum relief and cooling in the ComfortNext line
Warranty
15 years
Trial Period
100 nights
Shipping
In-home delivery
Height
14 inches
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.
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.
Our Hands-On Experience
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.
Ratings Breakdown
How we score (1–10 rubric) →Lab measurements: in the queue
The Sleep Number ComfortNext Ultra has been slept on and scored by our testers, but it has not yet gone through the full instrumented protocol — pressure mapping, thermal imaging, motion transfer and edge-deflection loading. Rather than publish estimated numbers, we leave this table empty 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) provides excellent pressure relief for side sleepers. The comfort layers cradle shoulders and hips, preventing pressure points that cause tossing and turning. We recommend this mattress for side sleepers of all body types.
Back Sleepers
Back sleepers will find the Sleep Number ComfortNext Ultra's 5/10 firmness ideal for maintaining proper spinal alignment. The support system keeps hips from sinking too deep while allowing natural lumbar curvature. Our back-sleeping testers rated this 9.2/10 for support.
Stomach Sleepers
At 5/10 firmness, the Sleep Number ComfortNext Ultra may be too soft for stomach sleepers. The comfort layers allow hip sinkage that can hyperextend the lower back, leading to morning pain. Stomach sleepers should consider a firmer option (7+ on our scale).
Combination Sleepers
The Sleep Number ComfortNext Ultra's air chamber hybrid construction provides responsive support that adapts as you change positions throughout the night. The coil system provides bounce that makes repositioning effortless. Combination sleepers rated this highly in our testing.
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 lab data — and the one thing each does differently. Scores are out of 10 on our published rubric.
Tempur-Pedic TEMPUR-breeze° has stronger edges (8.9 vs 8.2).
Technogel Favola 3.0 is better value for money (8.1 vs 7.2).
King Koil Reserve Luxury has stronger edges (8.7 vs 8.2).
Purple RejuvenatePlus sleeps cooler (9.5 vs 9.0).
SFERRA Nuvole Luxury Pillow Top has stronger edges (9.0 vs 8.2).
Want a different pairing? Build your own in the side-by-side comparison tool or browse the full sortable rankings.
Sleep Number ComfortNext Ultra Price Tracker: When It's Cheapest
Queen pricing. List price $4,499, currently advertised at $4,499.
Worth waiting if you can. The Sleep Number ComfortNext Ultra typically drops to around $2,700–$3,375 around Labor Day (Late August – early September), roughly $1,799 below today's price. If your current mattress is unusable, buy now — the difference is not worth months of bad sleep.
| Sale event | Window | Typical off list | Estimated queen price | Notes |
|---|---|---|---|---|
| Presidents' Day | Mid-February | 20–35% | $2,925–$3,600 | First real sale of the year. Good depth, thin inventory on new models. |
| Memorial Day | Late May | 25–40% | $2,700–$3,375 | One of the two deepest events of the year and the best spring window. |
| Fourth of July | Late June – July 4 | 20–35% | $2,925–$3,600 | Similar depth to Presidents' Day, usually with better bedding bundles. |
| Labor Day | Late August – early September | 25–40% | $2,700–$3,375 | Model-year clearance. Best time to buy last season's flagship. |
| Black Friday | Mid-late November | 30–45% | $2,475–$3,150 | Deepest discounts of the year on most brands, plus the best free-bundle value. |
| Cyber Monday | Monday after Thanksgiving | 30–45% | $2,475–$3,150 | Usually identical pricing to Black Friday; occasionally $50–100 deeper online. |
How to read this: the list and current prices are the Sleep Number advertised figures at our last check. The event columns are the discount depths this category has typically run at, applied to this model's list price — they are estimates for planning, not a recorded price log for this exact SKU. Always confirm the live price before buying. See our best time to buy a mattress guide and current mattress deals.
Frequently Asked Questions
Customer Reviews
Worth the upgrade from ComfortNext
The extra inch and denser comfort layers are noticeable. I tested all three ComfortNext models in store and the Ultra had a distinctly more luxurious feel.
Quick Specs
- Type
- Air Chamber Hybrid
- Firmness
- Medium-Soft
- Height
- 14 inches
- Trial
- 100 nights
- Warranty
- 15 years
How We Tested the Sleep Number ComfortNext Ultra
Every mattress we review goes through our rigorous, multi-step evaluation process. Here's exactly how we arrived at our scores for the Sleep Number Sleep Number ComfortNext Ultra.
Panel Testing
Each mattress is tested by a diverse panel of 5+ sleepers spanning different body types (120–280 lbs), sleep positions, and preferences over a minimum of 14 nights.
Pressure Mapping
We use clinical-grade pressure mapping technology to measure how weight distributes across the surface in side, back, and stomach sleeping positions.
Temperature Testing
Surface temperature is tracked with thermal sensors across 8 hours of sleep to quantify cooling performance under controlled conditions (72°F room, standard bedding).
Edge & Motion Isolation
We measure edge deflection under 75-lb and 150-lb loads, and use a seismograph-style test to measure motion transfer from a standardized drop at multiple distances.
Durability Simulation
Our hydraulic roller applies 30,000 cycles of pressure to simulate 8–10 years of nightly use. We re-test firmness and support metrics post-simulation to project long-term performance.
Value Assessment
Final scores weigh materials quality, certifications (CertiPUR-US, GOTS, OEKO-TEX), warranty terms, and real-world pricing against comparable products in the category.
Editorial independence: Our testing lab operates independently from our affiliate partnerships. Brands cannot pay for higher scores or influence our methodology. 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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Month-by-month pricing data to save up to 50%
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White sale calendar & seasonal deal guide
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How Sleep Number ComfortNext Ultra compares
Side-by-side breakdowns we've published featuring Sleep Number.
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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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