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Helix Moonlight Mattress Review

Boasting a soft and breathable feel, the Helix Moonlight from Helix Sleep is a hybrid mattress with both foam and coil layers. It’s soft to lie on, but has a little bounce to it, too. This mattress is one of the softer models Helix offers, and it has a ton of great reviews! So, I had to test it out for myself to see if it lives up to the hype.

The Moonlight comes in a standard model and a luxe model. The Moonlight Luxe has a few additional features, including zoned support and a pillow top. Keep reading to find out everything you need to know about the Helix Moonlight standard and luxe, including construction details, what type of sleepers they’re best for, and how they truly feel.

Short on time? Skip down to my review summary.

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Helix Moonlight
Helix Moonlight
Helix Moonlight

The Helix Moonlight is great for side sleepers thanks to its super soft, pressure relieving comfort. 

Is the Helix Moonlight a Good Mattress for You?

The Helix Moonlight is one of Helix’s six hybrid mattresses and it comes in both a standard and pricier luxe version. I’d recommend checking out my Helix mattress review and Helix Luxe mattress review to learn more about the other mattresses in both lines.

Depending on your unique sleep needs, like your body weight, preferred sleeping position, and whether or not you sleep with a partner or pet, the Helix Moonlight or Moonlight Luxe may or may not work for you. Take a look at some of my recommendations below. 

Helix Mattress Firmnesses
The standard Helix Moonlight mattress.

Who I recommend the Helix Moonlight for

  • Both the Helix Moonlight and Helix Moonlight Luxe are great beds for side sleepers. The Moonlight has an ultra plush feel that gives side sleepers the deep sinkage they need at the hips and shoulders. I think the Luxe model could be a better choice for sleepers with back pain, since its zoned support system is designed to promote a straight spinal alignment.
  • The Moonlight has a nice bouncy feel, which means you’re unlikely to feel “stuck” in this bed. I’d readily recommend this bed to combination sleepers who require ease of movement from their mattress.
  • The Moonlight Luxe is a nice option for couples. It has the bouncy feel most couples want (since it helps with sex) and its memory foam pillow top absorbs quite a bit of motion, so you’re unlikely to be disturbed by your partner tossing and turning on their side of the bed.
  • I think the Moonlight is a great bed for anyone suffering from shoulder pain or hip pain. It has a super plush feel that cradles sensitive joints. 
The Helix Moonlight Luxe mattress
The Helix Moonlight Luxe.

Who I don’t recommend the Helix Moonlight for

  • I think both the Moonlight and the Moonlight Luxe are too soft for stomach sleepers. Those who sleep prone need a firm mattress to help keep their hips in line with their shoulders. I’d recommend these sleepers go with the firmest Helix model, the Helix Dawn or one of our best mattresses for stomach sleepers
  • I don’t think the Moonlight or the Moonlight Luxe has adequate support for heavier sleepers (those over 250 lbs). I’d recommend these sleepers check out the Helix Plus, which is specifically designed for heavy people, or one of our best mattresses for heavy people.

How Firm is the Helix Moonlight Mattress?

Now that you know a few basics on the Moonlight, let’s talk about what it feels like, starting with firmness. Like any feel factor, firmness can be quite subjective depending on your body composition and how you like to sleep. For reference, I’m a stomach sleeper and around 5’10” and 190 lbs.

Helix Moonlight Firmness
The Helix Moonlight has a softer feel that’s good for easing shoulder pain.

After lying on the standard mattress for a while, I decided to give it a firmness rating of 5.5 out 10 on the firmness scale. Given that the industry standard is a 6.5 rating for medium firmness, my rating confirms that this bed is quite soft. The Moonlight Luxe had about the same firmness rating, though it did offer a bit more sinkage thanks to its pillow top layer.

This lines up with the description of the Helix Moonlight as one of the softer models in the six-mattress line. I gave this mattress a 5.5 because the Helix Dynamic Foam established a soft and plushy feel that really cushioned my body for extra comfort.

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Helix Moonlight
Helix Moonlight
Helix Moonlight

The Helix Moonlight is great for side sleepers thanks to its super soft, pressure relieving comfort. 

Helix Moonlight Mattress Performance

While mattress firmness is important, it isn’t everything. As well as rating the firmness of the Helix Moonlight, I conducted a few specific tests to see just how the standard Helix Moonlight performs for different sleepers. Read on below to learn more.

Testing the Helix Moonlight Mattress in Different Sleeping Positions

Depending on your weight and preferred sleeping position, the Moonlight will feel different to you. Take a look below to see how the Moonlight performs for sleepers of different weights.

Is the Helix Moonlight a Good Mattress for Light Sleepers (Under 130 lbs)?

  • Light Back Sleepers – These sleepers should get enough support on the Moonlight and Moonlight Luxe, especially if they like a softer feel.
  • Light Side Sleepers – These sleepers should feel really comfortable on either Moonlight model. They’ll get plenty of cushioning around sensitive pressure points.
  • Light Stomach Sleepers – Stomach sleepers need extra support to keep their spine aligned while they sleep, so they’ll likely find this mattress too soft for their needs. I’d suggest they opt for a firmer Helix model, like the Helix Dawn.

Is the Helix Moonlight a Good Mattress for Average Weight Sleepers (130 – 250 lbs)?

  • Average Weight Back Sleepers – I’d recommend these sleepers opt for the Moonlight Luxe, which offers a bit more back support than the standard Moonlight model.
  • Average Weight Side Sleepers – The standard and Luxe Moonlight mattresses are both good fits for side sleepers who want to avoid uncomfortable pressure on their shoulders and hips.
  • Average Weight Stomach Sleepers – Both Moonlight models are too soft for these sleepers. Stomach sleepers will find their hips sinking into these beds, creating a bend at the back that can lead to pain over time.

Is the Helix Moonlight a Good Mattress for Heavy Sleepers (over 250 lbs)?

The standard Moonlight and Moonlight Luxe are both too soft to be supportive enough for heavier people. Like I mentioned up top, I’d recommend these sleepers check out the Helix Plus mattress, which was designed specifically with them in mind.

Helix Moonlight Mattress Pain Relief Performance

Pain relief is an important consideration for a lot of sleepers. To measure pain relief, I like to use a pressure map test, which measures how much pressure a mattress will place on sensitive joints.

To get a sense of how the mattress relieves pressure on potentially sensitive spots like your joints and lower back, I used my trusty pressure map. After setting up the map on top of the mattress, I rolled around on it to see how much force my body exerted on the structure. The device creates a color-coded map of that pressure, where blue areas show low pressure and red areas show high pressure.

Helix Moonlight Pressure Relief
I was impressed with the pressure relief the Helix Moonlight provided

Back Pain – These pressure maps are all blue, which indicates the Moonlight does a nice job relieving tension at the back. However, I recommend sleepers with back pain opt for a firmer mattress to really promote a healthy sleep posture.

Shoulder Pain – Based on the graph above, this soft mattress is a great fit for sleepers with shoulder pain. Either the Luxe or standard Moonlight should do a nice job cushioning the shoulders to prevent stiffness and relieve pain.

Hip Pain – Similarly, either Moonlight model should do a great job relieving hip pain. I’d recommend it to sleepers looking for gentler pressure relief in this area.

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Helix Moonlight
Helix Moonlight
Helix Moonlight

The Helix Moonlight is great for side sleepers thanks to its super soft, pressure relieving comfort. 

Helix Midnight Mattress Performance for Couples

Couples have unique mattress needs that solo sleepers don’t. To measure how well a mattress might work for folks who share a bed, I look at a few specific features. Read on below to learn more about those tests.

Motion Transfer

Motion transfer measures how much movement you can feel from one side of the bed when you’re resting on the other. This is something relevant to all sleepers, but it’s particularly crucial for anyone sharing their bed with a partner or a pet who might move around at night.

Our motion transfer test involves dropping a 10 lb. steel ball onto the mattress from three different heights (4 inches, 8 inches, and 12 inches) and measuring the type of disturbance it causes using a seismometer. You can see the standard model’s results below.

Helix Moonlight Motion Transfer
Motion transfer test results for the Helix Moonlight

These are some pretty middling results, suggesting that you may well be disturbed by motion transfer (unless you’re a super heavy sleeper, of course). Given that the Helix Moonlight doesn’t have a memory foam comfort layer, which goes a long way to isolate movement, this isn’t super surprising! That means that the Helix Mattress is not necessarily ideal for light sleepers who aren’t alone in bed. The Luxe got similar motion transfer results.


Though there is no one-size-fits-all best mattress for couples, you generally want a bed that combines bounce and motion isolation. Bounce makes it easy to move around during sex, which is important to many couples. Both the Midnight and Midnight Luxe have some nice bounciness, so either should be good for sex.


Couples tend to prefer cooling mattresses because they overheat more quickly than solo sleepers. Luckily, both of the Moonlight mattresses sleep cool. Breathable pocketed coils really encourage airflow throughout these beds. But the Moonlight Luxe’s cooling cover gives it the edge over the standard model in this category.

Edge Support

Edge support refers to how well a mattress holds up on the edges as compared to the center. A mattress with good edge support can feel larger, which is great for anyone sharing a bed. Both Moonlight models have pretty good edge support! All the mattresses in the Helix line have reinforced edges, which adds to their overall durability.

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Helix Moonlight
Helix Moonlight
Helix Moonlight

The Helix Moonlight is great for side sleepers thanks to its super soft, pressure relieving comfort. 

What is the Helix Moonlight Mattress Made Of?

The Helix Moonlight is a hybrid mattress, meaning it combines foam layers with pocketed coils for a soft and bouncy feel. Plus, a reinforced perimeter in the pocketed coil layer adds awesome edge support, which means you won’t slide off the bed if you get too close to the side.

Standard Helix Moonlight

Cover – The Helix Soft Touch mattress cover is made entirely of polyester, so has a nice, breathable feel to it. This increased airflow helps to establish a cooling tone for the mattress.

Comfort Layer- Just below the cover is a comfort layer of Helix Dynamic Foam, which is a latex hybrid-foam alternative designed to contour to your body. This isn’t memory foam, so it won’t provide that “sinking” feeling some people love. Instead, it feels more like a gentle cushioning with a bit of lift and bounce.

Transition Layer- This layer is also made of Helix Dynamic Foam, providing your body with ergonomic support that’s still soft and comfortable.

Support Layer – This layer contains individually-wrapped coils for bounce and mobility. It also has a layer of coils that have a reinforced perimeter for edge support, meaning you can roll right to the edge of the bed without worrying about sliding off!

Base Layer – Beneath the coils, you’ll find a base layer built of DuraDense foam, a high density polyfoam that provides the mattress with support and stability.

Helix Moonlight Mattress
The Helix Moonlight uses foam and coil layers

Helix Moonlight Luxe

Cover – The Moonlight Luxe has a Tencel cover, which is made from eco-friendly eucalyptus fibers and offers even better temperature regulation than the Helix Soft Touch cover.

Pillow Top Layer – The Helix’s pillow top layer quilted with gel foam to provide some initial pressure relief.

Comfort Layer – Next up is two layers of Helix Dynamic Foam, which offer some nice contouring and pressure relief

Transition Layer – This layer is made from high-grade polyfoam. It provides ergonomic support and contour, and prevents the sleeper from sinking right down to the coil layer.

Support Layer – Like the standard Moonlight, the Luxe has a layer of hundreds of individually wrapped coils. However, these coils have zoned support; they’re softer under the shoulders and firmer at the hips, which promotes a straight spinal alignment.

Base Layer – Last up is a layer of DuraDense foam to provide the mattress with support and stability. 

Helix Moonlight Unboxing and Off-Gassing

Like any bed-in-a-box, the Moonlight has an off-gassing and decompression period after unboxing. Your mattress should be decompressed and ready to sleep on after a few hours. Personally, I think all Helix mattresses have a strong off-gassing smell, but as long as you leave your new mattress in a well-ventilated room any odor should dissipate after 24-48 hours. If you’re especially concerned about smell, avoid adding sheets to your new bed for a day or two to allow it to fully air out.

My Final Thoughts about the Helix Moonlight Mattress

The Helix Moonlight is a hybrid mattress that uses soft foams for pressure relief and pocketed coil support for some added bounce. The gentle feel is great for side sleepers and the bouncy coils mean you won’t feel stuck in the mattress while trying to change positions.

My favorite things about the Helix Moonlight mattress

I really like this mattress for side sleepers, as it didn’t put too much pressure on my shoulders or hips! While on my side, I felt I sank into the Moonlight just enough to keep my spine in a straight line. I also like that the hybrid build is super bouncy, which makes for a really pleasant feel—and you can change positions without feeling “stuck” in the mattress.

My Helix Moonlight mattress complaints

I would not recommend this bed for stomach sleepers. The Moonlight is one of Helix’s softest models, and most stomach sleepers need a firm mattress to keeps their hips in line with their shoulders—with this mattress you’re likely to find your hips sinking down into the bed, throwing your spine out of alignment and potentially causing some aches and pains down the line. I’d recommend these sleepers check out one of Helix’s firmer mattress models, like the Dawn or the Twilight. Helix also offers a sleep quiz on their site to help you choose the best model for your needs.

How Much Does The Helix Moonlight Cost?

Price is always an important factor when purchasing a new mattress. Take a look at the pricing chart below, and make sure to visit our Helix coupon page for the latest deals.

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Helix Moonlight
Helix Moonlight
Helix Moonlight

The Helix Moonlight is great for side sleepers thanks to its super soft, pressure relieving comfort. 

SizeHelixHelix Luxe
Twin XL$799$1,349
California King$1,449$2,349

Helix Mattress Policies and FAQs

Does the Helix Moonlight have a trial period?

The Helix Moonlight and the Helix Moonlight Luxe both come with a 100-night sleep trial. 

Does the Helix Moonlight come with a mattress warranty?

Yes, the standard Helix Moonlight comes with a 10-year warranty. The Helix Moonlight Luxe comes with a 15-year warranty.

How does the Helix Moonlight ship?

All Helix mattresses are bed-in-a-box mattresses, which means they ship compressed in a box. All Helix mattresses ship for free.

Do I need a box spring with the Helix Moonlight mattress?

Nope, any hard, flat, and level surface will do. The Moonlight also works with platform beds, slatted bed frames, and adjustable bases.

Does the Helix Moonlight have an off-gassing period?

Yes, both the Moonlight and the Moonlight Luxe have an off-gassing period. You’ll need to wait between 24 and 72 hours for the smell to fully dissipate. 

Helix Moonlight Mattress Vs  

Before I finish up this review, I’d like to compare the Helix Moonlight to some of its competitors from other popular mattress companies. See how it stacks up to the competition below.

Helix Moonlight vs Casper 

Casper Mattress
The Casper Original mattress.
  • The Helix Moonlight is a hybrid mattress, while the original Casper comes in both a hybrid and all-foam version.
  • The Casper feels quite a bit firmer than the Helix Moonlight.
  • The all-foam Casper is about the same price as the Helix Moonlight, while the hybrid Casper is a bit more expensive than the Moonlight.
  • Want to see more? Check out my Casper mattress review.

Helix Moonlight vs Saatva

saatva mattress
The Saatva mattress in the Sleepopolis studio.
  • The Saatva is an innerspring mattress, while the Helix Moonlight is a hybrid model.
  • The Saatva comes in three firmness options, while the Moonlight comes in one firmness option, but is one of Helix’s six hybrid options that range in firmness.
  • The Saatva is quite a bit more expensive than the Helix Moonlight.
  • Learn more in my full Saatva mattress review.

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Helix Moonlight
Helix Moonlight
Helix Moonlight

The Helix Moonlight is great for side sleepers thanks to its super soft, pressure relieving comfort. 

Other Models from Helix

Lastly, I’d like to show how the Helix Moonlight compares to some of Helix’s other models. Each model comes in both a standard and a luxe version. I’ll be comparing standard versions below.

Helix Moonlight vs Helix Midnight

Helix Midnight
The Helix Midnight.
  • Unlike the soft Moonlight, the Helix Midnight has a medium-firm feel. It’s a better option for sleepers who like a bit more support.
  • I’d recommend the Midnight as a better option for back sleepers, who tend to need a bit more support than side sleepers.
  • The Moonlight and Midnight come at the same price point.
  • Learn more in my full Helix Midnight mattress review.

Helix Moonlight vs Helix Dusk 

The Helix Dusk mattress.
  • The Helix Dusk is firmer than the Helix Moonlight.
  • The Helix Dusk is a better choice for back sleepers (it’s a touch firmer than the Helix Midnight).
  • The Moonlight and the Dusk cost the same amount?.
  • Check out my full Helix Dusk mattress review for more.

Check out how the Moonlight performed on our star rating chart below.

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Helix Moonlight
Helix Moonlight
Helix Moonlight

The Helix Moonlight is great for side sleepers thanks to its super soft, pressure relieving comfort. 

Helix Moonlight
  • Materials
  • Comfort
  • Support
  • Value
  • Cooling
  • Edge Support
  • Trial
  • Warranty
Logan Block
Logan is the content director of Sleepopolis, which means he not only reviews new mattresses every week, but also curates all the comparisons, best of pages, and video guides on the site. He takes a straightforward, honest approach to his reviews and endeavors to give viewers an objective look at each new product he tries out. Logan has perfected his method by personally testing over 200 different mattresses, so he’s not only able to discern the overall vibe of a specific bed, but to contextualize its feel within the bed-in-a-box market as a whole. When he’s not hopping on a new bed or working with our editorial team to whip up an engaging sleep education guide, you can find him reading books on world history, walking his dog Pepper, or searching for the best cheeseburger in New York City.