How Long For Eve Mattress To Expand

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Free delivery & returns

All Emma mattresses bought online on our website are shipped for free and directly to your doorstep. Each Emma mattress is shipped factory fresh and neatly vacuum-packed straight from our warehouse to your front door. Once your order is sent out, we’ll send you a tracking link via email, so you can check its progress. We recommend taking full advantage of our risk-free 100-night trial. You need plenty of time to figure out whether the mattress is a right fit for you and we’ve discovered that 100 nights is the perfect amount of time for you to get a good feel of the mattress. Should you decide its not quite right, you can return it for free. Just use our self-service returns portal, we’ll take care of the rest.

It’s as easy as 1-2-3

Take your Emma mattress out of the box, lay it on a flat surface and roll it out.

Snip off the plastic wrapper with the handy cutter we enclosed in the box.

You’re all set! Just wait a few hours to let your Emma mattress breathe and you’re ready to sleep happier.

Frequently asked questions

Shipping and return costs are free. We want you to happily await your new Emma mattress without concern for pesky shipping costs.

"As soon as you’ve placed the order for your mattress online, we’ll get right on making sure your mattress gets to you as soon as possible. All Emma Original mattresses are shipped factory-fresh straight from our warehouses to your doorstep. Just so you know: we use UPS, DPD and Renus to get your order to you. Once you’ve placed your mattress order online, you’ll get a delivery confirmation email. You’ll get another email (and a tracking link) once your order has shipped. Your tracking link will allow you to follow your order on its journey to you. Don’t worry if you can’t be in, when your mattress is ready to be delivered. Just tell us your favourite neighbour’s name and we’ll drop it off with them. "

You can find the estimated delivery time on the product pages. Please keep in mind that orders are only shipped once we’ve received your payment. Depending on the payment method this might take a couple of days.

The Emma mattress needs only a few hours to reach its full size and is ready to be slept on. But fresh air is good for all of us! So, if you like, you can air it out for a few hours in a well-ventilated room.

taking care of your eve mattress

Congratulations on your brand new, box-fresh, snuggly eve mattress.

Whether you’ve got the original, premium, hybrid or light, each mattress is unboxed in the same way and needs some TLC, so here are some handy tips to help get things off to the perfect start.

how do I set up my new mattress?

First things first, how the dickens are you going to get that rather large new mattress of yours out of its box? Don’t worry; it’s actually pretty easy. So have a stretch, queue up your favourite 80’s montage music, and we’ll get started…

Step 1

First, lay the box down sideways on top of your bed. Try and hold off from climbing on and pulling the covers over you just yet – there’s still a few more steps to go.

Step 2

Next, open out both ends of the box and push the mattress through on to your bed. We recommend keeping the box in case you want to build a Wendy House later.

Step 3

Now, carefully remove the outer plastic film. It’s probably time to pop the kettle on.

Step 4

Time for the fun bit: unrolling your new mattress. It’s pretty impressive watching how quickly it grows, right?

Step 5

Once it’s opened all the way out, flip it like a gymnast on Pancake Day.The side with the eve label is the side you’ll sleep on.This bit’s in bold because sometimes people forget which way up the mattress should be. Anyways. Now just position the mattress centrally, making sure that little eve label is at the foot of the bed.

Step 6

You’re nearly at the finish line. All that’s left to do is tear that protective plastic covering off and you’re there. Maybe give it 4 – 6 hours to grow lovely and plump before you hop in. In the meantime, that kettle’s probably boiled by now. Tea?

Step 7

And that’s it. You’re done. Let us be the first to wish you both many wonderful sleeps together, followed by happy, healthy days.

How long for eve mattress to expand

What Happens If You Sleep on a Memory Foam Mattress Before 24 Hours

So you’ve got a new memory foam mattress, you’re excited – in the back of your mind you remember some rule of thumb about waiting for a day before sleeping on it. The manufacturers say to wait for at least 48 hours before it expands fully, especially the ones that are still in the box. But if you’re curious what happens if you sleep on a memory foam mattress before 24 hours, then you’re in the right place.

Sleeping on a Memory Foam Mattress Too Soon

There are some essential things to consider before sleeping on a memory foam mattress too soon. For instance, most memory foam mattresses require up to two days before it goes back to its original size and form. After all, these mattresses are vacuum sealed, pressed and rolled tightly to fit in the packaging.

But can you sleep on a memory foam mattress the first night? Well, you can relax, jump, or do whatever you want with your bed as soon as you received it. Using it right away won’t cause any damage but will only speed up the process of expanding the foam.

This 24-hour recommendation is to ensure customer satisfaction and manufacturer guarantees.It also gives any off-gassing time to dissipate.

Why It Needs 24 Hours to Expand?

Well firstly, you you should know that the off-gassing happens in the first couple of hours. If it’s okay to sleep on your new memory foam without waiting for 24 hours to allow it to expand, then why do we still need 24-48 hours?

It’s all about the manufacturer guarantee. They claim that if it doesn’t fully open up and you did sleep on it then you’ll void that guarantee. If you’ve paid several hundred or even thousand on a new bed – you have to think twice about risking your money back opportunity.

But another important question is that, what should you do if your mattress takes more than 24 hours to expand fully? Well, there are rare cases wherein compressed memory foam mattresses don’t fully extend. If that’s the case, then you can ask your seller what to do to make it expand or ask for a new one.

Get yourself a mattress protector right now!

Waterproof Mattress Pad Protector Cover [Memory Foam]

For less than $20, save your mattress from spills for life.

If you are looking for the highest rated mattress protector on Amazon for your platform bed or box spring, here are the best choices we’ve found. Check these to find out if one of them is perfect for your needs.

Zinus Mattress – How Long to Expand

Most Zinus Memory Foam Mattress like the 12 Inch Green Tea Mattress need 48 to 72 hours to relax and decompress and restore to its original shape. That’s why the Zinus company manual advice customers to open the packaging within 72 hours of arrival to make sure the mattress they ordered will fully grow to its potential.

And with the green tea extract infuse in the foam, you will not inhale hazardous and harmful smell with you first open the packaging. It will typically dissipate after laying the mattress in a well-ventilated area.

What to Do When Memory Foam Mattress Not Inflating?

Memory foams have different thickness levels. You can choose from an 8-inch mattress to a 13-inch memory foam bed. They are designed with open cells to conform to various shapes of sleepers using the bedding. Before they leave the factory, these mattresses are folded and compressed using a machine roller to fit into a small package.

The best way to use a memory foam is to let it expand before using. However, if it’s not inflating, there are simple tricks you can do to enjoy its comfort after 24 hours of arrival. Check these tips to help you out:

  • Unbox the memory foam within the three days of arrival. Remove the plastic cover using your hands. Never use any sharp objects like a knife and scissors when removing the mattress from the package to avoid damages.
  • Allow the foam to adjust in room temperature, which may take up to a couple of hours until it begins expanding. This step is essential, especially when you get your memory foam in the winter season. Foam mattresses tend to become more brittle if it’s still tight, which can lead to tearing.
  • Unroll it in a spare room so the open cells of the memory foam will expand and inflate freely. Separate each layer of the foam carefully to allow them to grow. Pull them in uniform motion with slow and steady hands.

What Are the Possible Reasons Why your Lucid Memory Foam Mattress is Not Expanding?

If your Lucid memory foam mattress is not expanding, there might be an essential step you haven’t performed after unrolling it. First, it needs time to develop, typically within 72 hours before you can finally use the mattress. So wait for it until it becomes entirely usable in its original size.

Some memory foam mattresses take one week to air out, but they lose the new-foam smell at the same time. It is already fully plumped when you noticed that the smell is gone. And you can use a mattress topper to retain the plumpness of your new memory foam.

Key Takeaways

The truth is, each mattress has its own expansion time and features. Therefore, the time required before they fully expand will depend on the model and brand you purchased.

Before you can move it to your bedroom, most memory foam mattresses that usually take 24 hours to decompress may still need at least two hours. Waiting for 24 hours or 72 hours to allow a bed to expand is a traditional belief.

Most of the mattresses offered on the market today only take a short time to decompress, and you can sleep on the right after unboxing them. So there’s nothing to worry about sleeping on your mattress too soon. You won’t damage your memory foam while sleeping on it during the first night.

The key is in the type of memory foam used in your mattress. The higher quality the foam, the better and faster it will expand in less than 24 hours.

Mattress Ruined. What Happens If You Sleep on Your Memory Foam Mattress Before 24 Hours?

Table of Contents

How Long to Let Your Memory Foam Mattress Expand?

The general rule is to give your new memory foam mattress 48 hours to expand and inflate to its proper size.

The real answer is not that simple. Every memory foam mattress has its unique requirements.

The following chart shows what each manufacturer recommends. Below that we go over where the 48 hours comes from and if you can immediately sleep on your new mattress.

Mattress Expansion Times For Each Manufacturer

amerisleepCan lay on it right away but could take 8 hours for the corners to expand fully and you should wait 2 hours before putting sheets on.
BEDBOSSShould decompress in 24 hours, but let it sit for 2 hours before moving it to the bedroom.
Bedinabox“It expands in about 3 minutes” is what I got when I emailed them. This seems too fast; I would still give it a few hours to be on the safe side.
CasperCan expand and be ready to sleep on in a few minutes but keep in mind that some will take longer.
Classic BrandsAllow 24 to 72 hours for the mattress to regain its full shape. If the mattress gets to its full height, it’s ready to use.
Dreamfoam Bedding6 to 7 hours from opening.
HelixGive it 2 hours to regain its shape, and you’re done.
LaylaWill take its full shape within minutes, and you can sleep on it right away. If you’re sensitive to smell give it a few hours to air out.
LeesaMay take up to an hour to expand but give it 24 hours to fully expand and be at its best
LinenspaUp to 48 hours but they do say you can jump on it as soon as you like. If anything they say your body heat can help speed up the expansion process.
LUCIDUp to 48 hours, but if it’s fully expanded after 24 hours you can go ahead and sleep on it.
LullWill do most of the expanding in 2 to 5 hours and fully expand in 24 to 48 hours.
MLILYShould be ready in 24 hours. Walking on it while it’s on the floor can help speed up the process.
NectarBetween 24 to 72 hours to expand.
Nest BeddingYou can sleep on it right when you open it, but it can take up to 24 to 48 hours for it to fully expand.
Olee Sleeplet it expand up to 72 hours
PuffyAllow it to expand and breathe for a few hours before putting bedding on it.
Purest Of AmericaAllow 24 to 72 hours to fully recover.
Signature SleepWait at least 48 hours.
Tuft & NeedleOnly takes several hours to reach the proper specifications, but in some cases, it may take up to 5 days.
TuloAllow it to sit for an hour before using it.
Zinus48 to 72 hours to fully decompress. Zinus recommends you sleep on the mattress during this time as it helps to full up the mattress. If after a week it hasn’t expanded, please contact them.

Don’t see your mattress? Go ahead and give it a couple of hours to expand, but let me explain why.

Can You Sleep on a New Memory Foam Mattress Straight Away?

The reason why you wait 24 hours, 48 hours or 72 hours is an old saying that people keep repeating.

As shown from the chart a significant number of manufacturers report shorter times and a good bit suggest sleeping on the mattress the first night. The reason is for your constant movements, and body heat loosens the foam. The more lose the foam, the better it expands.

Where The 48 Hour Memory Foam Expansion Time Came From

The first generation of memory foam mattresses is where this wait time wives tale came from. More time was needed for older memory foam mattresses to air out there odors.

The mattresses today don’t smell as bad; I would still recommend letting them air out for a few hours to absorb the smells of its surroundings. I know it sounds odd, but it’s well worth doing.

What if my mattress says to wait a few hours? – Well, it’s better to play it safe than sorry. The people that best understand your mattress are the ones who made it.

What If Your Memory Foam Mattress Is Not Inflating?

No need to worry if your memory foam mattress is not expanding; here is what you do.

Get the mattress flat as possible on the floor. Wearing clean socks walk on the mattress. The constant moving around combined with your body heat expands the mattress. I like to think of it as a mattress massage.

After massaging the mattress place it back on the bed frame and sleep for a few nights.

Keep in mind:New mattresses are like new shoes; they need to be broken in. Over the years you have gotten used to your old mattress, so the new one is going to feel different. We tend to forget this because we only buy mattresses every decade or so.

What To Do After Your Memory Foam Mattress Has Expanded?

I mean, you spent all this money you probably want it to last as long as possible?

If you want your mattress to last, you need a mattress protector.

Your mattress is a giant sponge, and it will soak up all the sweat, soda, dead skin and other nasty stuff you do in bed. Those liquids sit there not only making the mattress dirtier but destroying the function of the structure. It’s hard to work correctly when “waterlogged” with juices.

Plus, modern-day mattress protectors feel and look like regular bed sheets. I even have a review on the very one I use on my mattress. They’re not even that expensive either; I consider it crazy when people don’t use something so practical and affordable.

How Long Should You Leave a Memory Foam Mattress Before Sleeping on It?

It’s best to let your memory foam mattress expand for 48 hours. If you can’t give 48 hours then allow the mattress to expand for 6 hours before sleeping on it.

What Happens If You Sleep On Your Mattress Too Soon?

If you sleep on your mattress before it’s expanded it’s not the end of the world. In fact, many mattress manufacturers recommended you sleep on it the first night because your body heat helps to expand the foam.

I would not worry about it too much. The goal is to give the mattress a few hours before you sleep on it. It can take some mattress a whole week to reach its correct size and sleeping on it won’t hurt.

It’s Been A Week And The Mattress Has Not Expanded.

If it’s been a week and the mattress has not expanded correctly then, unfortunately, you have a defective mattress.

The good news is that this is usually rare. If it’s been a week no need to keep fighting it, contact the company you bought it from to check out the return policy. If you’re curious about returns and what they do with the old mattress check this out.

If you have to return the mattress and want a new one I’ve had good luck with Zinus Green Tea Mattress.

Frequently Asked Questions


All Questions and Answers


Mattress Specific Questions and Answers

About us


No, we don’t have a traditional showroom, but we are available to try and buy at various Next, Debenhams and Fenwick stores throughout the UK. Of course, with our 200 night trial, you can also try the mattress at home and if you’re still in love with it, we’ll sort out collection and refund your money in a jiffy – no questions asked.

Click here to find your nearest eve hot spot.


eve is a UK-based company, with all of our products lovingly designed right here in London.


All materials used in our products have the right certifications to ensure that they’re safe and non-toxic.

Orders & Delivery


All of our deliveries are still happening on time and on schedule.

Delivery varies by product – please see below

Delivery within three working days of placing your order, between 8am and 7pm.
Our standard delivery service is free, although remote areas may be charged.
Available for all our products except our bed frames (see ‘2-man delivery’ below).

choose your delivery slot

Delivery on a day of your choice.
You can choose to receive your package between 8am and 7pm (from £6) or between 8am and 2pm (from £10).
Next day delivery is available if you order before 1pm Monday to Thursday, or before 12pm on a Friday.
Available for all our products except our bed frames (see ‘2-man delivery’ below).

Available for bed frames.
Delivery on a nominated day, to a room of choice, between 8am and 7pm. Though deliveries above the second floor are dependent on access to a lift. Our delivery partner can only deliver or collect items up to the second floor or less if no lift is available.
The evening before the delivery date, our delivery partner will provide you with a 2 hours time slot.

Our standard couriers aren’t allowed to help carry boxes any further than the main entrance of your home (it’s something to do with insurance). Unless you’ve ordered bed frames, your package can only be delivered to your front door.
If you’ve ordered a few different products, we can’t always guarantee that they’ll all arrive on the same day. This is especially true for orders that contain both a mattress or bed frame and some of our smaller products.
If you chose to pay using interest-free credit, it occasionally takes a tiny bit longer for your package to be delivered. Your payment application needs to be verified by our finance partner before 1pm for your order to be dispatched on that same day.

If you live in the Channel Islands, Scottish Highlands and Islands, you may be charged for you delivery. £59 for bed frames and premium mattresses, £30 for other mattresses and £10 for all other items. Your delivery will also take a bit longer (sometimes up to 10 working days)


We do try to make sure your items get to you at the same time, but unfortunately our products aren’t always shipped together as different couriers may be used depending on the product. We do give you a tracking code for each item as soon as your order has been shipped so you can trace your eve purchases.


Due to the size and weight difference we use different couriers to keep the delivery cost as low as possible.


Unfortunately the couriers will not call before the delivery as they are not provided with work phones.


We are currently offering non-contact delivery, which means that your parcel can be left in a safe place with no need for a signature. Once your order is on its way you’ll be able to select this option. During the order process you can provide details you wish to tell the delivery couriers, which may assist them with your delivery. Please note that our couriers will not call to notify you before delivering your order.


We’re unable to provide discounts for orders with the finance payment options as we cover the the interest fee for you.


Yep, however we aren’t able to offer our guaranteed next day delivery option so your eve items will only be delivered on a standard weekday service. (please note that an additional delivery charge will be applied at checkout)


No, we don’t offer custom-sized mattress, we are sorry. Please get in touch with us if you have further queries.


We use Yodel, Hermes, UK Mail, DX, Panther and DHL.


Amazon is an independent retailer of our products. When purchasing through Amazon you’d need to contact them directly for all after care regarding your mattress – as this wouldn’t be able to be done through us.

Payments & Refunds


Yes we do. Discount codes are available for a limited period of time and can be found on our website, our social channels or partnership websites.

Our discount codes are not available on orders that use our interest free finance option.
Discount codes may be subject to additional terms and conditions (including expiry date/time) which will be shared at the point of publication.
All discount codes are subject to availability and only one code can be used per order.

To use your discount:
When you are in the order summary, click: "Add coupon code here"

– Enter your code
– Click Apply

The majority of our discount codes are created for orders that include a full sized, foam mattress (this excludes the mattress topper and baby mattress).
Please always check the advertisement for further details.


Only one discount code can be used per order. We often run multiple promotions so please use the one that works out better for the products that you want to buy.

You can always save the other one for your next order.


As soon as your eve product is on the way back to us we’ll process your refund to the account you paid with. The money should be with you within three working days.


That’s entirely up to you. You can pay with credit or debit card, PayPal or 0% interest-free credit.


Unfortunately, we don’t use cheques. Due to security reasons, we are only able to refund via your original payment method. Just give us a call on 0800 808 5766.


You can choose the interest-free option on the payment details page, right after you select your delivery date. There’s a minimum order amount of £250.


We can’t tell you before you apply for sure whether you’ll qualify, but we can only consider your application if:

You have a good credit history. You’re employed or retired and have considered your ability to afford and sustain the repayments. You’re a permanent UK resident, over 18 and able to supply three years of address history. You have a debit or credit card.


We’re sorry to hear that your finance application was not approved. Unfortunately we’re unable to influence our finance partner’s decision – and they don’t share any information on why an application is declined with us, due to confidentiality laws.


We accept Visa Credit, Visa Debit, Visa Electron, MasterCard and American Express.


Yes you can. We’re not able to remove the VAT from your purchase at the checkout just yet, but we’re working on improving this aspect of our payment system in the near future. Please do send us an email to [email protected] after you have purchased and we will refund you the amount of VAT you paid.



Simply email your return request to [email protected] , and a member of our customer support team will assist you further. You can also see the return policy for our eve products on our handy refund and return page .


Absolutely not. We offer free returns on all eve products returned within the UK.


We recommend that you to carefully measure your bed frame to avoid getting the wrong size mattress, but in case you did get the wrong size it’s no biggie – we allow you to exchange your product within the one hundred night trial. If your mattress has already been unpacked, a shipping and handling fee of £30 will be applied.


You can just sit back and relax while our two-man collection company will come and pick up the mattress from your bedroom. It’s completely hassle-free.


You don’t need to keep your mattress box – as it will be impossible for you to get it back in there unless you’re some sort of super human! For other products, they can be returned in any box you like, but it might be easier for you to pack it in the original one it came in.


You don’t have to worry about that – our collection company will take care of the packing for you.


When you place an order through Amazon they are responsible for managing the processing and shipment of your order. Unfortunately this means that we won’t have your order details. As Amazon are an independent retailer, we are unfortunately not able to handle any issues associated with orders placed through their website – including returns.

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