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Images: Helix. Shown size and configuration may vary.

Helix

Dawn

Name: Helix Dawn
Brand: Helix

Best for: Back and stomach sleepers

An 11.5″ firm hybrid, also in Short Queen and RV King.

Good to know: Live price and current trial length couldn't be confirmed; check helixsleep.com.

Type: Hybrid
Height: 11.5″
Sizes: 8 ready-made

Firmness, according to reviewersFirm

Pick it if

You sleep on your back
You sleep on your stomach
You’re a heavier person

Skip it if

You sleep on your side
You’re on the lighter side

From independent reviewers’ findings, credited below.

Your size

72 × 80 in · 11.5″ tall

Where to get it

helixsleep.comOrder online · delivered to you See price
For heavier peopleReviewers: Best for heavier sleepers See the list

Returns: 120 nights from delivery (per the archived page) 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

Back and stomach sleepers

Good

An 11.5″ firm hybrid, also in Short Queen and RV King.
Trial: 120 nights from delivery (per the archived page)
Six of 10 owners rated back support 4 out of 5, including a 7-year owner who rated sleep quality 5 out of 5.
Height: 11.5″

Think about

Live price and current trial length couldn't be confirmed; check helixsleep.com.
Four owners, including two in their first 3-6 months, rated back support 1-2 out of 5.

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

From owners of a related model A small set of real reviews, each linked to its source. Not a star rating.

Small sample · 10 owner reports

The few GoodBed owners of the Helix Dawn mostly rate back support well, though some rate it and sleep quality poorly.

What people liked

Six of 10 owners rated back support 4 out of 5, including a 7-year owner who rated sleep quality 5 out of 5. Source ↗

What to weigh up

Four owners, including two in their first 3-6 months, rated back support 1-2 out of 5. Source ↗

What independent reviewers found

Mattress Clarity (Oct 2026): Firm feel with strong edges and good responsiveness for combination sleepers, but motion rippled across the bed and cooling was only average. One tester found lumbar support lacking; a strong chemical smell at unboxing. Tested both 2024 and 2025 versions (only the cover changed); size not stated; page scores are internally inconsistent; affiliate links disclosed on page. Read it ↗
Sleepopolis (Oct 2026): Firm hybrid with praised lumbar support and good edges, about-average motion isolation for a bouncy bed, and some warmth at the lower back. Best for back, stomach, and heavier sleepers; not for side sleepers with sensitive joints or lighter people. Slight odor gone within a day. Page shows conflicting update dates (2024 and 2026); model year not stated; size not stated; affiliate links disclosed on page. Read it ↗
Tom's Guide (Jan 2026): A stomach-sleeper tester used a queen for over three weeks. Firm, even support kept the hips in line; side sleepers lacked shoulder cushioning. Long-side edges held well, corners weaker; some heat retention noted. Originally tested under an older Tom's Guide method. Tom's Guide discloses affiliate commissions. Read it ↗
Sleep Advisor (Oct 2026): Rated 7.5/10. Favoured by average-weight (130-230 lb) back and stomach sleepers; not recommended for side sleepers. Surface warmed about 5 degrees in testing; noticeable motion transfer and edge sinkage (2.5/5). Version tested not stated; page has internal contradictions on motion and trial length. Discloses referral fees and Amazon Associates. Read it ↗

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

Sources & sample limits

10 GoodBed owner ratings naming the Helix Dawn (May 2021-Nov 2025) Sample: 10 owner reports.

GoodBed's page for this name mixes owners of the pre-2024 Helix version (many report owning it 3-7 years) with owners of the current 11.5″ Core collection bed, so it is treated as related. GoodBed reviews here are ratings only (no written text), so items paraphrase the star ratings. No Reddit owners of the Core Dawn were found on RedditRecs.

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

Every size it comes in

RV king72 × 80 in11.5″Short queen · 74-inch60 × 74 in11.5″Twin38 × 75 in11.5″Twin XL38 × 80 in11.5″Full · 54-inch54 × 75 in11.5″Queen60 × 80 in11.5″King76 × 80 in11.5″California king72 × 84 in11.5″

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

Video reviews

Dawn · Review

Helix Dawn Mattress Review — Pros & Cons

NapLab · YouTube ↗

Dawn · Review

Helix Dawn Mattress Review In 60 Seconds

NapLab · YouTube ↗

How it compares

Beside the most similar mattresses from other brands.

	DawnHelix	Elite HybridBear	Elite Ultra HybridBear	Original HybridBear
Type	Hybrid	Hybrid	Hybrid	Hybrid
Queen price	—	$1,599	$2,129	$829
Height	11.5″	14″	13.5″	11″
Trial	120 nights	365 nights	365 nights	365 nights
Odd sizes	2	None	None	None
Expert reviews	4	3	2	1

What’s inside

1Breathe Knit cover (GlacioTex cooling pillow-top optional)
2SupremeSupport 2.5 memory foam
3Gel memory foam comfort layer
4Helix Premium Responsive Foam firmness layer
5Responsive foam support layer
6Optional ErgoAlign contour segment
7Up to 1,000 individually wrapped coils with reinforced edges
8DuraDense foam base

Feel: Firm
Height: 11.5″
Custom sizes: Not offered for this model

Complete the bed

Odd sizes need everything else in the same inches. Here’s what we have for this mattress’s odd sizes.

RV king · 72 × 80

Short queen · 74-inch · 60 × 74

Returns and ordering

Trial and returns

120 nights from delivery (per the archived page)

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?

Helix Core collection, 11.5″ hybrid: proprietary memory foam and gel memory foam over responsive foams tuned for back and stomach sleepers who like a firm feel, on up to 1,000 wrapped coils with reinforced edges and a DuraDense base. Options on the page: Breathe Knit cover or a GlacioTex cooling pillow-top upgrade, and an optional ErgoAlign extra-firm foam segment under the hips.

How firm is it?

Firm That’s the maker’s description; we haven’t measured it.

Which sizes and heights can I get?

8 sizes, 11.5″. See every size. Confirm your exact size and height with the seller.

Are the reviews about this exact mattress?

From owners of a related model. GoodBed's page for this name mixes owners of the pre-2024 Helix version (many report owning it 3-7 years) with owners of the current 11.5″ Core collection bed, so it is treated as related. GoodBed reviews here are ratings only (no written text), so items paraphrase the star ratings. No Reddit owners of the Core Dawn were found on RedditRecs.

Where did this information come from?