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Images: Sleep Number. Shown size and configuration may vary.

Sleep Number

ComfortMode Lux

Name: Sleep Number ComfortMode Lux
Brand: Sleep Number

Best for: Extra support, no app

An 11″ ComfortMode step-up with foam over air chambers, per-side firmness by remote, and 25% more cooling materials than ComfortMode, per Sleep Number.

Good to know: No Twin size, and no app or sleep tracking: firmness is set by remote only.

Type: Adjustable air (hybrid: foam + air chambers)
Height: 11″
Sizes: 5 ready-made

Pick it if

You sleep on your side

Skip it if

You need firm edges

From independent reviewers’ findings, credited below.

Your size

38 × 80 in · 11″ tall

Where to get it

sleepnumber.comQueen $2,499 · checked Oct 15 See price
Split kingSplit King See the list

Returns: 100-night trial (same terms as the rest of the lineup) Details

We may earn a commission if you buy. Check the price for your exact size and height on the seller’s site.

The short version

Worth a look if

Extra support, no app

Good

An 11″ ComfortMode step-up with foam over air chambers, per-side firmness by remote, and 25% more cooling materials than ComfortMode, per Sleep Number.
2 firmness choices: Adjustable firmness per side via remote (no app), Labelled 'Extra support' on the collection page
Trial: 100-night trial (same terms as the rest of the lineup)
Height: 11″

Think about

No Twin size, and no app or sleep tracking: firmness is set by remote only.
No owner reviews we could verify yet
Standard sizes only: no RV, odd or custom sizes listed

Based on the maker’s published specs and terms, and the owner reviews linked below. We haven’t slept on it. Something wrong? Tell us.

What owners say

No owner reviews we can verify yet A small set of real reviews, each linked to its source. Not a star rating.

No owner feedback we can use yet.

What people liked

No supported praise summary in the sample.

What to weigh up

No substantive concern verified in this small sample. This is a gap in the evidence, not proof of no drawbacks.

What independent reviewers found

Sleep Foundation (Oct 2026): Covered as the upgraded ComfortMode, an inch thicker with extra cooling material, zoned support and hip cushioning. That makes it a better pick for side sleepers across weights. Like the base model, it has adjustable firmness, weak edges and average motion isolation. Shared page that mainly reviews the standard ComfortMode, so Lux-specific test detail is limited; affiliate links disclosed on page. Read it ↗
Sleep Foundation (Oct 2026): In the Sleep Foundation ComfortMode test, the Lux is an inch thicker with added cooling and zoned support. Its thicker foam absorbs more motion than the standard model, but makes moving around harder at softer settings. No dedicated edge support. Review is of the ComfortMode collection with the standard model as the main test bed; Lux-specific notes are limited to these comparisons. Site discloses it may earn a commission. Read it ↗

Their testing, in our words. We haven’t tested these mattresses ourselves, and we don’t repeat their scores.

Sources & sample limits

No usable owner sources. Sample: 0 owner reports.

Owner comments gathered from Reddit via RedditRecs were removed: RedditRecs and Reddit ask automated tools not to collect their content.

Research checked October 14, 2026. These are sourced observations, not our own product tests or a star rating.

Every size it comes in

Twin XL38 × 80 in11″Full · 54-inch54 × 75 in11″Queen60 × 80 in11″King76 × 80 in11″California king72 × 84 in11″

Taken from the maker’s size options, in the inches it publishes. Tap a size to compare every mattress made in it.

How it compares

Beside the most similar mattresses from other brands.

	ComfortMode LuxSleep Number	AS5 HybridAmerisleep	AS6 Black SeriesAmerisleep	Elite HybridBear
Type	Adjustable air (hybrid: foam + air chambers)	Hybrid	Hybrid	Hybrid
Queen price	$2,499	$2,149	$2,649	$1,599
Height	11″	14″	14″	14″
Trial	100 nights	100 nights	100 nights	365 nights
Odd sizes	None	None	None	None
Expert reviews	2	1	2	3

What’s inside

1Foam comfort layers (unnamed, thickness not published)
2Adjustable air chambers

Feel: Adjustable firmness per side via remote (no app), Labelled 'Extra support' on the collection page
Height: 11″
Custom sizes: Not offered for this model

Returns and ordering

Trial and returns

100-night trial (same terms as the rest of the lineup)

Before you order

Measure inside the frame, not the old mattress
Check clearance above for the height you pick
Make sure your base supports it
Buy sheets in the same exact size

Questions

What is it made of?

Hybrid design with foam layers over adjustable air chambers. Sleep Number claims advanced relief for hips and 25% more built-in cooling materials than ComfortMode. Responsive Air is listed. The page publishes no layer stack.

How firm is it?

Adjustable firmness per side via remote (no app), Labelled 'Extra support' on the collection page That’s the maker’s description; we haven’t measured it.

Which sizes and heights can I get?

5 sizes, 11″. See every size. Confirm your exact size and height with the seller.

Are the reviews about this exact mattress?

No owner reviews we can verify yet. Owner comments gathered from Reddit via RedditRecs were removed: RedditRecs and Reddit ask automated tools not to collect their content.

Where did this information come from?

Checked 2026-10-15. Specs and terms can change.