The best organic mattress 2024: Natural beds for a non-toxic sleep

Best organic mattress: Photo of the Birch Natural mattress on a beige bedframe placed in a grey bedroom
(Image credit: 3Z for Tom's Guide)
Best organic mattress: Quick menu

This year’s best organic mattresses use natural, sustainable materials and focus on eco-friendly production to create beds that sleep cool, are naturally hypoallergenic, and create a non-toxic sleep environment. Like the best mattresses, our top organic picks are durable, long lasting investments, free from harmful chemicals like fibreglass.

Our panel of professional mattress testers are experienced in checking GOTS and GOLS material certifications to ensure mattresses adhere to the organic status. Our experts also test each mattress to analyze their performance across areas like pressure relief, support and comfort, and temperature control to find the best organic mattress for every individual sleep need and preference, from the top option for side sleepers to the most suitable for those who experience back pain. After rating each mattress out of 5 for these key areas, as well as considering budget, organic credentials, and perks, we’ve pulled together this guide to the top 6 picks.

The Avocado Green mattress comes out on top at number 1, a latex hybrid bed featuring a Dunlop latex comfort layer designed to provide the perfect level of firmness for different areas of your body. As you can imagine, premium natural materials come at a premium price, but with the Black Friday mattress sales on the horizon, there’ll soon be generous discounts across many brands, making it an excellent time to invest in your next organic bed. Find the perfect choice for you now in this guide, chosen by our expert reviewers. 

Quick list

Scour our quick list if you only have time to read the highlights. If you're interested in learning more about a particular model, jump down the page for our in-depth analysis.

Best organic mattress overall for 2024

Best organic mattress: a man and his baby son sit and play on an Avocado Green mattress

(Image credit: Avocado Green)
The best organic mattress overall

Specifications

Type: Latex innerspring hybrid
Firmness (1-10): 7
Height: 11"
Wool: GOTS certified organic
Latex: Dunlop (GOLS)
Cover: GOTS organic cotton
Trial: 365 nights
Warranty: 25 years
Price bracket: Premium

Reasons to buy

+
Supports up to 700lbs
+
Best for back sleeping
+
Sleeps cool
+
No-wool, vegan version available

Reasons to avoid

-
Delivery costs at least $99

The 100% certified organic Avocado Green Mattress is solidly made. It contains a 2-inch Dunlop latex comfort layer that lies over the top of a zone support core. This delivers different levels of support to different parts of your body, so you won’t feel the same level of firmness across the entire mattress – it will be firmer or softer in specific areas. It’s the coils that give it a firmer feel, which also makes it one of the best mattresses for heavier bodies. (The mattress can support up to 700lbs. of combined weight.)

We tested the Avocado Green Mattress and can recommend it to anyone who is prone to sleeping hot. That’s because its breathable organic cotton cover is naturally able to wick away sweat, so you’ll feel cooler and drier, even during the warmer months. (It's also cool to the touch.) The 100% natural latex is cooling too and is combined with tall pocketed coils for a slightly bouncy yet firm feel. For as much bounce as it has, we found the Avocado Green's motion isolation impressive so couples will fare well with this one. Edge support is also excellent.

If you're a back or stomach sleeper, the medium-firm feel of the Avocado Green, combined with its ergonomic zones, will be a blessing. If you're not used to a firm mattress, allow yourself some time to break it in. However, if you're a side sleeper, you're unlikely to get as much pressure relief along the shoulders and hips as you'd like, even after a week or two of sleeping on it. (Alternatively, you can add a pillowtop for a plusher feel for another $400.)

You’ll get a one-year trial, which is market-leading, and it comes with a 25-year warranty. For the latest savings, see our guide to the best Avocado mattress sales and deals as well as our Avocado Mattress promo codes. Discounts range from 10% off to $200 off after coupon – but note that like most brands in the industry, Avocado has raised the retail prices of its beds in response to the current cost of living crisis. Also, beware that unlike most mattresses on this list, delivery is not free – it costs between $99 and $249.

Avocado Green mattress: was from $1,399now from $1,189 at Avocado

Avocado Green mattress: was from $1,399 now from $1,189 at Avocado
You can't always bank on there being any kind of Avocado mattress sale outside of their usual 10% off discount (where a queen Avocado Green mattress is usually down to $1,799). However, Avocado has rolled out a 15% off discount for Black Friday. You can now get a queen size Avocado Green for only $1,699, plus a 25-year warranty and 1-year trial. 

Best budget organic mattress

Best organic mattress: image shows the Awara Natural Hybrid Mattress in white with red piping around the edges

(Image credit: Awara)
A budget-friendly organic mattress from Nectar's sister brand

Specifications

Type: Latex innerspring hybrid
Firmness (1-10): 8
Height: 13"
Wool: Organic New Zealand wool
Latex: Dunlop (FSC)
Cover: Organic cotton
Trial: 365 nights
Warranty: Forever
Price bracket: Mid-range

Reasons to buy

+
Incredible value for money 
+
Responds quickly to movement
+
Luxuriously thick

Reasons to avoid

-
Higher motion transfer
-
Too firm for some

The Awara Natural Hybrid Mattress has been discontinued in a brand relaunch and replaced with a new natural mattress, the Awara Natural Luxury Hybrid. A similar design to the original, we will be reviewing the Natural Luxury Hybrid soon to see if its natural credentials stand up to its predecessor. For now, a queen Awara Natural Luxury Hybrid Mattress is $1,049 in the Awara sale.

The Awara Natural Luxury Hybrid Mattress is our best budget organic mattress pick, and it offers incredible value for its mid-range price. You'll always pay a slight premium for a natural mattress, but the Awara is currently under $1,000 for a queen size, making it the cheapest option featured here, by a decent margin (it's not eligible for our cheap mattress list, but it is one of the best affordable mattresses around). The extras are outstanding, too – this mattress comes with a full  year's sleep trial, forever warranty and free shipping and returns. That's the most comprehensive package on this list. 

The Awara uses GOLS-certified latex along with GOTS-certified New Zealand wool, and we rate it one of the best hybrid mattresses made with natural materials. Rated an 8 out of 10 in terms of firmness, this is a firm, supportive mattress that'll suit back and stomach sleepers, as well as being a great choice for anyone struggling with back pain. We found the latex delivered enough shoulder and hip cushioning to make this mattress comfortable for side sleeping, although some side sleepers will prefer something softer. It'll work for people between 130 and 230lbs. If you want an organic mattress for heavier bodies, take a look at the Avocado Green Mattress (at #1), as this can support a combined weight of up to 700lbs.

We were impressed with this mattress' temperature regulation: the latex is breathable and the coils boost airflow further, while the cotton cover is particularly good at wicking away moisture, making this mattress a decent choice for those who sleep warm. A potential downside is that the bouncy, responsive surface creates more motion transfer – something to keep in mind if you’re a restless sleeper or if you share your bed with a partner. Unlike some other models here, there’s only one level of firmness. The Saatva Zenhaven Latex (at #3) is a better choice if you aren’t sure what firmness you need, as that model offers two different types in one organic mattress.

It was a very close-run battle between the Awara  vs Birch mattress (#4). In the end, the Birch won out for its more universally appealing firmness (a 6.5-7 out of 10, compared to the Awara's 8). The pros and cons of the two mattresses are similar, and the Awara arguably offers better value for money, although the Birch does use pricier Talalay latex for its comfort layer, whereas the Awara uses Dunlop. 

Awara Natural Luxury Hybrid Mattress: was from $896 now from $649 at Awara

Awara Natural Luxury Hybrid Mattress: was from $896 now from $649 at Awara
The Natural Luxury Hybrid is new release from Awara, replacing the Natural Hybrid Mattress while maintaining much of its predecessors characteristics – including organic latex and wool comfort, individually wrapped coils, and an impressive price for an organic mattress. A queen will set you back $1,049 (was $1,383) in the up to 50% off sale. 

Best luxury organic mattress

A woman lying down on the Essentia Stratami Organic Mattress

(Image credit: Essentia)
Essentia's best luxury organic mattress

Specifications

Type: Latex
Firmness (1-10): 6.5
Height: 11"
Latex: GOLS certified organic Latex
Cover: GOTS organic cotton
Trial: 120 nights
Warranty: 20 years
Price bracket: Premium

Reasons to buy

+
Supportive for back and stomach sleeping
+
Excellent motion isolation
+
Temperature neutral
+
Luxury build and finish

Reasons to avoid

-
9% fee on the retail price for returns or exchanges

The Essentia Stratami mattress is one of the best luxury mattresses made from 100% GOLS Certified Organic Latex. The support core ensures proper spinal alignment, with the responsive latex cradling and contouring to your body’s movements. Further to this, the latex is shaped into domes to allow proper airflow between the surface of your mattress and your body, as well as relieving pressure from key areas. Essentia calls this mattress a ‘natural firm’ and our testers rated it at a 6.5 out of 10, so medium firm.

When we tested the Essentia Stratami mattress, we scored it 5/5 for temperature regulation. The combination of the GOTS organic cotton cover and the domed latex meant that the breathability of the mattress was superb, making temperature regulation throughout the night a breeze for our tester. They also found the all-latex structure made for excellent motion isolation, suiting couples with varying schedules and combination sleepers. The Stratami also excelled in edge support, making getting in and out of the bed easy and maximizing the sleeping area, another feature that makes it a suitable option for couples.

While it is a medium-firm mattress, side sleepers may want a little bit more pressure relief in key areas like the shoulders and hips, although our panel of side sleeping testers did still find this a comfortable sleep surface. Back and stomach sleepers will feel supported and comfortable night long, thanks to the layers of domed latex and the base support core. The soft cotton cover is followed by a non-toxic Kevlar flame barrier to ensure the mattress is flame retardant, and there is an option to upgrade to the EMF Foam Protection which is designed to shield you from electromagnetic radiation.

You’ll get a 120-night sleep trial, which isn’t the most generous trial we’ve seen but will likely be long enough for your body to become accustomed to the mattress, and it comes with a 20-year warranty which will likely cover the lifespan of the mattress. Discounts range throughout the year, with Essentia offering moderate discounts during major holidays and sale events, but currently there aren’t any deals on the Essentia Stratami mattress, meaning the price is definitely still on the luxury, premium end of mattresses.

Essentia Stratami Organic mattress:was from $2,915now from $2,332 at Essentia

Essentia Stratami Organic mattress: was from $2,915, now from $2,332 at Essentia
This luxury all organic latex mattress is a premium option, which doesn’t usually see generous discounts and sales. However, the current Black Friday sale sees 20% off, making a queen size $3,080 (was $3,850) and you’ll get a 20-year warranty, 120-night trial, and free shipping, although you will have to pay 9% of the retail price to return it if it’s not to your liking.  

Best organic latex hybrid mattress

A close up of the corner of the Naturepedic Concerto Organic Pillow Top mattress

(Image credit: Naturepedic)
The best latex hybrid organic mattress

Specifications

Type: Latex innerspring hybrid
Firmness (1-10): 5
Height: 11.8"
Wool: Certified organic wool batting
Latex: GOTS approved organic latex
Cover: USDA certified organic cotton
Trial: 100 nights
Warranty: 25 years
Price bracket: Premium

Reasons to buy

+
Pressure relieving 
+
Perfect for side sleepers 
+
Plush but responsive 
+
Sleeps cool 

Reasons to avoid

-
No customization options

The Naturepedic Concerto Pillow Top is a latex hybrid mattress, meaning there are seven layers of certified organic latex, organic cotton and wool batting, high-density microcoils, and encased coils. This, combined with the plush pillow top, creates a soft but responsive surface, ideal for side sleepers. However, because of the impressive support, the mattress will cater to a wide range of sleeping styles.

Our professional mattress testers were surprised by how soft this mattress felt, but both back sleepers and side sleepers found it to be comfortable, with the euro top offering excellent pressure relief and the 4000 high-density microcoils offering targeted support and spine alignment. This mattress also excels in temperature regulation, sleeping naturally cool because of the breathable natural fabrics used, like wool and cotton, alongside the dual coil layers that allow airflow throughout the structure. Despite the soft, sinking in feel, both edge support and motion isolation are good in this mattress, thanks to the responsive nature of the latex.

The mattress uses glueless encased coils that are individually wrapped for full body contouring. These add to the bouncy feel of the mattress, as well as aiding heat dissipation for easier temperature regulation. Like the best pillow top mattresses, the plush quilted cotton pillow top is made with  wool batting and a PLA plant-based comfort layer which is naturally moisture wicking, keeping the mattress fresher for longer.

Naturepedic is a 1% for the Planet member, which means they put sustainability and the environment first. With your purchase you’ll get a 100-night trial, which is on the shorter side of sleep trials, but it does come with a generous 25-year warranty. Discounts range throughout the year, with Naturepedic regularly offering around 20% off on certain mattress models during major holidays and sale events. Currently there is a sitewide Fall sale offering 20% off, bringing the price of the Concerto Pillow Top down but still keeping it within the premium range of most mattresses.

Naturepedic Concerto Pillow Top mattress:

Naturepedic Concerto Pillow Top mattress: from $1,699 at Naturepedic
This luxury all latex innerspring hybrid mattress sits at the high-end of mattress prices. However, with the current fall discount, a queen size is $2,239.20 (was $2,799) and you’ll get a 25-year warranty, 100-night trial, and free shipping and returns. 

Best organic mattress for back pain

Best organic mattress: The Nolah Natural 11 Mattress on a wooden bed frame and dressed with pillows

(Image credit: Nolah Sleep)

5. Nolah Natural 11 Mattress

An eco-friendly, fully organic mattress for back pain relief

Specifications

​​Type: Latex innerspring hybrid
Firmness (1-10): 6
Height: 11"
Wool: GOTS Organic
Latex: Natural Talalay
Cover: Organic cotton
Trial: 120 nights
Warranty: Lifetime
Price bracket: Upper-mid

Reasons to buy

+
Naturally cooling bed
+
Supportive for back and side sleepers
+
Coils from recycled steel
+
Relatively affordable pricing

Reasons to avoid

-
No shipping estimate on website
-
$99 returns fee

Nolah Sleep makes a wide range of highly rated boxed mattresses, and the Nolah Natural 11 is the brand’s eco-friendly hybrid. It's a smidge more expensive than the Amerisleep Organica at #5, but still affordable in the context of the organic mattress market. This model is made from natural Talalay latex, a durable material that offers 33% more pressure relief than synthetic and Dunlop latex. That makes it the best organic mattress for sleepers with back pain and sore joints, and for those who need higher levels of pressure point relief (think shoulders, hips and back).

The natural and organic materials continue apace, starting with an organic cotton cover that’s breathable and moisture-wicking. You’ll still need to use a mattress protector, but it’s good to know that the Nolah Natural 11 prevents any moisture from building up within. Handcrafted in the USA, this eco-friendly mattress also packs in layers of GOTS certified organic wool that’s naturally breathable and temperature-regulating. This helps the Nolah to feel warm and cozy in cold weather, yet breathable and cool to the touch when the temperature rises. The hole-punched latex foam also increases airflow. 

Tri-zone coils, made from recycled steel, deliver targeted support in high pressure areas for a range of sleeping positions, whether you’re snoozing alone or you share your bed. The natural Talalay latex is very responsive too, offering a nice amount of bounce while cushioning your joints. You won’t sink in like you would on a memory foam mattress, but you will feel well-supported and rested. And because the Nolah Natural mattress is rated as a 6 out of 10 on the firmness scale, it will best suit back and side sleepers who enjoy something just a little softer than medium-firm. 

You’ll have 120 nights to trial it at home (you have to trial it for a minimum of 30 nights), and the mattress comes with a market-leading Lifetime Warranty. If you change your mind during the trial period, Nolah will issue a refund but you will have to pay a $99 fee to cover collection and removal of the mattress. The award-winning Nolah Natural 11 is normally on sale for hundreds of dollars off and we have rounded up the best Nolah mattress sales and deals to save you money.

Nolah Natural 11 mattress: was from $1,499now from $974 at Nolah Sleep

Nolah Natural 11 mattress: was from $1,499 now from $974 at Nolah Sleep
Nolah has bumped up its discounts from 30% off to 35% off for Black Friday, which means a queen size Nolah Natural set you back $1,364 rather than the standard discount price of $1,449. We can't guarantee that this deal will be around for long, so we suggest taking advantage if you're in the market for an eco-friendly mattress that offers back pain relief. Extras include a 120-night sleep trial, free shipping, and a lifetime warranty. 

How we test organic mattresses

The Tom’s Guide mattress review process is editorially independent and not influenced by any third parties. Our expert mattress testers sleep on each mattress for at least three weeks - that's roughly how long it takes for your body to get used to a new mattress - and spend hours scientifically testing the performance of each product.  

Mattress firmness is subjective, so each lead reviewer also forms a trusted and experienced testing panel made up of people with different sleep needs and body types. We have side sleepers, back sleepers and stomach sleepers, with lighter, average and heavier bodies, who rate each mattress using a specific set of performance criteria. 

Together, these processes enable us to produce accurate, well-balanced and data-backed mattress reviews, to help you easily decide whether the mattress you’re interested in really is the best choice for you. Read our full mattress methodology for more.

Organic mattress FAQs

What is an organic mattress?

Why you can trust Tom's Guide Our writers and editors spend hours analyzing and reviewing products, services, and apps to help find what's best for you. Find out more about how we test, analyze, and rate.

Organic mattresses are made using non-toxic, certified organic materials including wool, cotton and natural latex. In most cases these materials are sustainably sourced, with many organic mattress brands working to keep their supply chain as short as possible (this is especially true for beds handmade in the same country). 

Not only do organic mattresses minimize the chance of allergic and asthmatic reactions, they are cooler to sleep on and they're durable too, so they last longer. So while they seem expensive in the beginning, long-term they will actually save you money. Not all organic mattress materials are suitable for all people though – if you are allergic to latex or wool, then you'll need to consider another type of mattress, such as a hybrid mattress in a box that's made of synthetic materials. 

The best organic mattress brands to look out for include Birch by Helix, Avocado Green, Saatva and PlushBeds. All of them offer trial periods of at least 100 nights (some offer a year's trial), with warranties ranging from 10 years to a Forever Warranty.

When is the best time to buy an organic mattress?

While all natural beds are pricey, November is the best time to buy an organic mattress thanks to the arrival of the Black Friday mattress deals in late November, which are followed by Cyber Monday mattress deals too. 

This year, for example, we had an exclusive Saatva offer that saved you $400 off every size of the Saatva Latex Hybrid, plus we saw a 25% discount on the Birch Natural Mattress, with a queen reduced to $1,592 (was $2,132), plus you could have bagged a free bedding set worth $333.

Are organic mattresses worth it?

This depends on why you're thinking of buying an organic mattress in the first place. If it's because you are taking steps towards a more eco-friendly lifestyle, then yes, organic mattresses are worth the higher cost. That's because they have a smaller carbon footprint and focus on using natural and sustainable materials, such as Talalay latex. 

As we explain in our feature answering what is an organic mattress, manufacturers also tend to partner with fairtrade material companies and those that ensure excellent animal welfare. An innovative few, such as the climate neutral-certified Avocado Green, even have their own rubber farm and own a herd of sheep to produce organic wool. 

If your reason for choosing an organic mattress is better sleep hygiene and health, then a natural or organic bed is also an excellent choice because they are free from toxins and use naturally breathable and moisture-wicking materials (such as cotton and wool) that are hypoallergenic. 

The other benefit of organic mattresses is that they are built to last longer than a standard mattress in a box, with warranties ranging from 15 years to lifetime warranties. The use of durable natural materials such as latex helps them last longer, which saves you money in the long-term and it means you won't have to dispose of a mattress for a long time to come. 

However, if you just want a good mattress made from CertiPUR memory foam and that will last you a good seven to eight years, then there are plenty of cheaper models to save you a lot of money and still help you sleep comfortably at night. 

A woman sleeps happily with her arm raised on a comfortable organic mattress

(Image credit: Getty)

What's better, Talalay or Dunlop latex?

Our Talalay vs Dunlop latex explainer goes through it in more detail, but here's the short version. Both types are made from the same raw material, but manufactured in slightly different ways. Talalay latex is typically softer, less dense and more expensive. It's better for comfort layers. Dunlop latex is typically firmer, denser, and cheaper. It's ideal for support layers, but is also sometimes found in comfort layers. Because of the way it's produced, Talalay latex cannot be GOLS certified organic. 

When is the best time to buy an organic mattress?

As with standard mattresses, there are specific periods throughout the calendar year when you can get a top-rated organic mattress for a lot less than normal. The best time to buy is in late November when all the Black Friday mattress deals arrive. We have been covering this sale period for years and now that organic mattresses drop to their lowest prices at this time thanks to large discounts from competing manufacturers. 

These offers always roll over to the Cyber Monday mattress deals too, which lands on the Monday directly following Black Friday. You may find that some brands throw in free gifts to help sweeten the deal, and it isn't unusual to see savings made up of money off and free bedding or other sleep gifts. Obviously with an organic mattress, the free bedding will always be made from natural or fully certified organic materials, further boosting your value for money. 

Other shopping events to look out for include the upcoming Memorial Day mattress sales towards the end of May, and this is a good chance to save on an organic mattress before the prices are generally increased over the summer period. 

All of that said, we have noticed a continuing trend among the best organic mattress brands to offer similar price cuts each month, as a way to make these normally more expensive beds a little more accessible to buy. Brands such as Plush Beds, Saatva and Awara offer evergreen discounts, and these normally comprise money off and free bedding. 

How to choose the best organic mattress

Before investing in a new organic mattress, carefully consider your current sleeping habits. Think about what you enjoy about your current mattress and what you would like to see improved. For example, waking in the night because you’ve overheated could be rectified with a mattress with cooling properties, like the Amerisleep Organica mattress. Or perhaps you’ve recently started waking up with back pain, in which case you might benefit from a mattress that specifically delivers targeted spinal support, such as the Nolah Natural 11 mattress. Whatever your sleep needs, make sure you opt for a mattress that meets them. 

Of course, you can’t really know how comfortable a mattress is until you start sleeping on it. Choosing a mattress with a long trial period, such as the Saatva Zenhaven Natural Latex, which comes with a 365 night trial, will allow you to purchase your mattress with peace of mind. 

How much does a good organic mattress cost?

Organic mattresses command a slightly higher price tag, and the most affordable options in our list start from around $1,100 for a queen size. However, a queen size Awara Natural Hybrid mattress, America’s most affordable organic mattress, is currently on sale for $999, which is the cheapest we’ve ever seen it. On the other end of the spectrum, a queen size Saatva Zenhaven Latex — which is crafted by New Zealand wool, natural latex and organic cotton — is currently on sale for $2,945. so prices really vary. Just like the best non-organic mattresses, prices vary in line with different features and specifications. 

Should you buy a sustainable mattress?

Let's put aside the environmental benefits for a moment – can your sleep benefit from buying a sustainable mattress? Mattress brands that opt for sustainable builds might not have the full range of materials to choose from, but these beds aren't simplistic or uncomfortable. Sustainable mattresses can still be made using the latest technology and with a comfort level that mimics even the best memory foam mattresses.

Before choosing a sustainable mattress, consider your sleep style. From my experience – both using on an eco-friendly bed and working as a sleep writer – sustainable mattresses tend to have a firmer feel that suits back and stomach sleepers. Side sleepers might struggle to find a softer sustainable bed, but the market is growing, and firmness is subjective. Otherwise, investing in a mattress topper can help soften a firm organic bed – our guide to the best mattress toppers can help you get started. 

To return to those environmental benefits, if you do prioritize sustainability, you shouldn't have to compromise when it comes to your sleep. A green bed doesn't have to mean someone has forgotten to clean their mattress – it could be just what your rest needs.

Meet our organic mattress expert

Mattress tester Jo Plumridge wearing a black top
Jo Plumridge

Jo Plumridge is an experienced mattress reviewer and sleep writer, as well as a freelance photographer. Jo has tested mattresses from a range of major bed brands including Nectar, DreamCloud and Emma Sleep, and prefers a firmer mattress with plenty of support and pressure relief.

Claire Davies
Senior Sleep Editor, Certified Sleep Science Coach

Claire is a fully qualified journalist and Certified Sleep Science Coach with over 15 years’ product review experience. Claire is responsible for all mattress and sleep content published on Tom’s Guide, including our Best Mattress of 2024 buying guide. She is our expert on Saatva, DreamCloud, Nectar and Tempur-Pedic mattresses, and is also our in-house hybrid mattress specialist. Claire is certified to advise people on how to choose a mattress that best suits their sleep, body and budget, as well as helping them to create a nighttime routine and bedroom environment that promote good sleep. As Senior Sleep Editor, Claire takes the lead on developing and overseeing rigorous testing procedures for our mattress reviews, both at home and in our fully equipped Sleep Studio. Claire leads a team of experienced sleep and mattress specialists who report on and test a wide range of mattress and sleep products, and she also writes about all things related to sleep, and has interviewed a wealth of experts including mattress designers and buyers, neuroscientists, and doctors of sleep medicine. 

With contributions from