Sleep Number ComfortNext Lux Mattress vs Sleep Number ComfortNext Ultra Mattress

Listed features, advertised feel, seller terms, and who each mattress may suit.

Sleep Number

ComfortNext Lux Mattress

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Sleep Number

ComfortNext Ultra Mattress

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Find your best fit

Start with your buying decision

Start with these listed features, advertised feel, and seller terms, then consider how they fit your preferences. The detailed comparison below covers shared features, differences, and questions to confirm before choosing either mattress.

Literal comfort-package difference

Sleep Number ComfortNext Lux Mattress: 13 inches; high-density foam + individually wrapped microcoils
Sleep Number ComfortNext Ultra Mattress: 14 inches; plush high-density foam + individually wrapped microcoils

Why it matters: Both beds use microcoils for quicker, localized response above adjustable air support. Ultra adds one inch and explicitly moves to a plush high-density foam package. Side sleepers who want more surface give around the shoulder and hip, and shoppers who equate luxury with a deeper cushioned first impression, have a clear reason to pay more. Lux is the better fit when you want the same responsive architecture with less plush material between you and the adjustable support.

Literal pressure-relief difference

Sleep Number ComfortNext Lux Mattress: Superior relief for hips, shoulders, knees, and lower back
Sleep Number ComfortNext Ultra Mattress: Maximum relief for the same four published body areas

Why it matters: Ultra intensifies the cushioning level rather than adding a fifth pressure zone. That matters most to a sleeper who feels pronounced pressure at several contact points or consistently prefers a plusher surface. Lux already names every body area listed for Ultra, including the lower back, so it is the smarter buy when you want broad coverage but do not need the deepest comfort treatment.

Literal cooling and airflow difference

Sleep Number ComfortNext Lux Mattress: Cooling level 4 of 6; 67% more built-in cooling material than ComfortMode + superior airflow
Sleep Number ComfortNext Ultra Mattress: Cooling level 5 of 6; 175% more built-in cooling material than ComfortMode + maximum airflow

Why it matters: This is Ultra's strongest measurable upgrade. The published cooling-material comparison jumps by 108 percentage points over Lux, and Ultra receives the line's maximum-airflow designation. A hot sleeper who wants to remain in a passive-cooling mattress has a credible reason to spend $425. Lux is already one step below the top of the brand's scale, so shoppers who wake comfortable should not expect the extra cooling material alone to transform their sleep.

Explore the details and buying cases →

Feature	Sleep Number ComfortNext Lux Mattress	Sleep Number ComfortNext Ultra Mattress
Overview
Type	Smart Bed	Smart Bed
Firmness Published feel or standardized wording	Adjustable on each side	Adjustable on each side
Queen Price Current / sale price	Check retailer	Check retailer
Trial Period Terms from the linked seller	✓ 100 nights at Sleep Number; 30-night minimum; $250 return pickup fee	✓ 100 nights at Sleep Number; 30-night minimum; $250 return pickup fee
Warranty	10 years	10 years
Performance Ratings
Cooling Hot sleepers	Very good	Very good
Motion Isolation Partners, light sleepers	Not rated	Not rated
Pressure Relief Shoulder and hip cushioning	Excellent	Excellent
Edge Support Sit/sleep near edge	Good	Good
Durability Long-term performance	Excellent	Excellent
Compatibility & Features
Adjustable Base Head/foot elevation	✓ Yes	✓ Yes
Split King Support Two Twin XL per couple	✓ Yes	✓ Yes
Dual Comfort Zones Different firmness per side	✓ Yes	✓ Yes
Smart Features App, sensors, auto-adjust	Adjustable firmness on each side, Responsive Air auto-adjustment where supported, SleepIQ sleep tracking on smart/app-enabled models, Sleep Number app or remote control depending on model.	Adjustable firmness on each side, Responsive Air auto-adjustment where supported, SleepIQ sleep tracking on smart/app-enabled models, Sleep Number app or remote control depending on model.
Financing	Sleep Number financing	Sleep Number financing
Materials & Certification Scope
Listed certifications / claims Check model and material scope	None listed	None listed
Certificate limitations Not an odor or safety guarantee	Confirm the certificate for the exact model and covered materials. A material certificate does not certify every part of a mattress or guarantee no odor.	Confirm the certificate for the exact model and covered materials. A material certificate does not certify every part of a mattress or guarantee no odor.
Best For
Ideal sleeper profiles	✓Couples ✓Side sleepers ✓Back sleepers ✓Hot sleepers	✓Couples ✓Side sleepers ✓Back sleepers ✓Hot sleepers
Actions	Full Review Check price at Sleep Number → Buy with confidence 100-night Sleep Number in-home trial at Sleep Number	Full Review Check price at Sleep Number → Buy with confidence 100-night Sleep Number in-home trial at Sleep Number

Check price at Sleep Number — ComfortNext Lux Mattress →Check price at Sleep Number — ComfortNext Ultra Mattress →

Which one fits you

Our buying recommendation

Buy ComfortNext Lux for the stronger value when you want Tri-Brid microcoil response, adjustable firmness, four-area relief, and high-level passive cooling in a balanced 13-inch build. Upgrade to Ultra when plushness and heat management are deciding factors. Its $425 premium buys one added inch, plush high-density foam, maximum pressure relief, cooling level 5, and a major jump in published cooling material. Ultra gently earns the upsell for a hot side sleeper who wants deeper cushioning; Lux remains the complete choice when the shared microcoil-and-air construction already fits.

Still deciding? Take our 2-minute mattress quiz →

Sleep Number ComfortNext Lux vs Ultra: What the Extra $425 Buys

ComfortNext Lux and Ultra share the line's defining Tri-Brid construction: adjustable air support, high-density foam, and individually wrapped microcoils. Ultra's $425 premium does not buy a new support system. It adds one inch of profile, changes the upper comfort package to plush high-density foam, moves pressure relief from superior to maximum, and advances cooling from level 4 to level 5 on Sleep Number's six-level scale. The published cooling-material comparison rises from 67% to 175% more than ComfortMode, while airflow moves from superior to maximum. Upgrade when you want the plushest contouring and strongest passive cooling in ComfortNext; choose Lux for the same microcoil response and body-area coverage with a more restrained surface and lower price.

Demonstrative cutaway of two microcoil adjustable-air mattresses with a deeper plush cooling package in the taller model — Construction illustration: The verified Lux and Ultra differences appear below.

Current Queen price

Sleep Number ComfortNext Lux Mattress: $3,399.15 current; $3,999 reference price
Sleep Number ComfortNext Ultra Mattress: $3,824.15 current; $4,499 reference price

Why it matters

The current gap is $425, much smaller than the step from ComfortNext to Lux. Ultra earns it with a plusher, one-inch-deeper comfort package, maximum pressure relief, and the largest passive-cooling jump in this line. Lux keeps the shared microcoils, adjustable firmness, and the same four named relief areas, making it the value choice when a balanced surface and cooling level 4 are enough.

Base and buy-with-confidence terms

Sleep Number ComfortNext Lux Mattress: Base sold separately; 100-night trial; 30-night minimum; $250 standard-area return pickup fee
Sleep Number ComfortNext Ultra Mattress: The same separately sold base options and direct-purchase trial terms

Why it matters

Ultra's premium pays for mattress materials and feel, not a base or a longer trial. Both eligible mattresses can be returned or exchanged once from day 31 through day 100. Sleep Number charges a $250 pickup fee in standard service areas, and an exchanged product becomes final sale without a new trial. Compare both with the same base choice so the mattress upgrade remains clear.

Construction detail	Sleep Number ComfortNext Lux Mattress	Sleep Number ComfortNext Ultra Mattress	What it means for you
Current Queen price	$3,399.15 current; $3,999 reference price	$3,824.15 current; $4,499 reference price	The current gap is $425, much smaller than the step from ComfortNext to Lux. Ultra earns it with a plusher, one-inch-deeper comfort package, maximum pressure relief, and the largest passive-cooling jump in this line. Lux keeps the shared microcoils, adjustable firmness, and the same four named relief areas, making it the value choice when a balanced surface and cooling level 4 are enough.
Base and buy-with-confidence terms	Base sold separately; 100-night trial; 30-night minimum; $250 standard-area return pickup fee	The same separately sold base options and direct-purchase trial terms	Ultra's premium pays for mattress materials and feel, not a base or a longer trial. Both eligible mattresses can be returned or exchanged once from day 31 through day 100. Sleep Number charges a $250 pickup fee in standard service areas, and an exchanged product becomes final sale without a new trial. Compare both with the same base choice so the mattress upgrade remains clear.

Who benefits from each mattress?

Use the differences above to match the mattress to the way you sleep. Each model has a clear reason to buy. When one costs less, choose it if it already delivers the feel, support, and temperature control you want. Pay more when the added material or feature gives you a benefit you expect to notice every night.

Choose Sleep Number ComfortNext Lux Mattress if:

You want responsive microcoils, lower-back coverage, superior airflow, and adjustable firmness without paying for the plushest tier.
You prefer a more balanced surface and want to feel the adjustable support through a 13-inch profile.
Cooling level 4 already suits you, so keeping $425 matters more than moving to the line's maximum passive-cooling package.

Choose Sleep Number ComfortNext Ultra Mattress if:

You are a side sleeper or plush-mattress shopper who wants the deepest cushioning in the current ComfortNext line.
Pressure at multiple contact areas regularly affects comfort and you want Sleep Number's maximum relief tier.
You sleep hot enough to value cooling level 5, 175% more cooling material than ComfortMode, and the line's maximum-airflow designation.

Published construction details and claims are from Sleep Number's current ComfortNext configurator, Compare Models table, and direct-purchase terms. SleepRanked reproduced the selected Queen prices, profiles, foam descriptions, pressure-relief tiers, cooling levels, base inclusion, and direct-store trial terms on September 12, 2026. Cooling percentages and relief descriptions are Sleep Number's current comparison claims; SleepRanked has not independently temperature-tested or pressure-mapped these mattresses. The demonstration image is generic and does not depict proprietary internal geometry.

Sleep Number ComfortNext Lux Mattress

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Sleep Number ComfortNext Ultra Mattress

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