How Long Memory Foam Mattress Expand

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How to Plump Up Memory Foam

Leave off bedding until a memory foam mattress or topper expands.

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Memory foam mattresses and pillows typically come compressed or vacuum packed in as small a package as possible, but this leaves them temporarily squashed. Plumping your new foam may only require a little time, but manufacturers suggest another reason to wait a short while before using your new memory foam product.

Waiting It Out

Your memory foam may take up to a day to fill out or plump up after you take it out of the packaging and it begins to expand to its original size. Some manufacturers suggest that you let your new memory-foam pillow or mattress air out for a day or up to a week until it loses any new-foam smell. By the time the smell dissipates, your foam product should be fully plumped. After you start using the mattress or pillow it should retain its plumpness, but rotating it once or twice each month can help. A 3-inch-thick memory-foam mattress topper should be sufficient for the average-sized person, but plumper 4- or 5-inch-thick toppers offer more support, if needed.

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

ManufacturerTime
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.

How long memory foam mattress 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.

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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.

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

Last updated on March 2nd, 2020 | By Amy Murphy | 4 Comments

You arrive home to find your new memory foam mattress at your doorstep. Your excitement is high as you begin to unbox the newest addition to your home. As you read the directions, your excitement hits rock bottom when you realize you are not supposed to sleep on it for 24 hours.

Everything is ready for this mattress to takes its place in your sleep sanctuary. Slats are placed perfectly for a firm foundation. The old mattress and box spring have been removed and discarded. Mattress topper and protector are ready. You just can not wait to crawl into this great mattress and enjoy a restful night’s sleep.

You’re thinking, it’s only a couple of hours before bedtime.

So, is it true that you should wait 24 hours? What would happen if you did sleep on it before 24 hours has elapsed? Will it be ruined after the first night? This is exactly what we will be discussing. Keep reading to learn why 24 hours is the target number and what happens when you sleep on your new memory foam mattress before 24 hours have elapsed.

What is Bed in a Box?

Memory foam mattress manufacturers found success in the online market. The internet allows consumers to research, shop, and buy almost anything. Your purchases are paid for and then shipped, in a box, right to your door. Some companies are so large and efficient they can do all this in 24-48 hours.

You may wonder how a mattress is going to fit in a box. Well, the box is now the primary mode of shipping for memory foam mattresses. This means manufacturers can compress, deflate, fold, and stuff a mattress in a box. Unlike traditional innerspring mattresses, memory foam is known for easy shipping and added comfort.

Getting a mattress in a box has changed the way we shop and sleep. Memory foam’s ability to be compressed, rolled, and folded is remarkable. All this action and the memory foam does not lose any of its quality. Once your bed in a box has reached your doorstep, all you need to do is pop the airtight seal, unroll the mattress and watch the expansion process begin. A good night of sound sleep is in your future.

Why is it Recommended to Wait 24 Hours Before Use?

Waiting 24-48 hours is standard for a memory foam mattress to completely take on its full shape. The reason for this instruction is to cover the manufacturer’s responsibility.

They prefer customers to wait 24 hours to allow for the expansion process to be completed. Only after the mattress has reached its full shape can a customer ensure they received the product they paid for. If there is cracking or splitting in the memory foam layer, it will not be visible until the expansion process is complete.

This 24-hour recommendation is to ensure customer satisfaction and manufacturer guarantees. It also gives any off-gassing time to dissipate. Usually, off-gassing happens in the first couple of hours.

What Will Happen if you Don’t Wait 24 Hours?

If you decide that waiting 24 hours is out of the question, have no fear. While the instructions say wait, it is generally okay if you don’t. The manufacturer always errs on the side of caution. Consumers need to follow instructions while understanding that some instructions are recommendations. If you only have a couple of hours, it is okay.

In fact, sleeping on your new memory foam bed before 24 hours can speed up the process. Body heat can make the memory foam more pliable, making it expand faster.

Only regular wear and tear from sleep can cause deficiencies in your mattress. This is not going to happen in one night. Remember that if you do choose to sleep on your mattress before it is fully expanded, you may not get the full set of benefits that particular night. A memory foam mattress can only provide a plush supportive feel at its full shape. This is why so many online companies offer lengthy sleep trials. A customer-friendly sleep trial allows you to give your new mattress an honest try before deciding if it’s for you or not.

To sum it all up, you can expect a rolled up, folded memory foam mattress upon unboxing. If your new bed beckons you before 24 hours, it’s perfectly safe to drift off upon it.

If after 24 hours your new mattress has not expanded or you notice defects in the foam, call the manufacturer.

Frequently Asked Questions

How long does a memory foam mattress take to inflate?

Generally, manufacturers say it takes 24-48 hours for a memory foam mattress to fully inflate. This time frame is not set in stone as each memory foam mattress is unique. Some new mattresses will take longer or even less time. You also do not have to wait a full 24 hours to put on your mattress protector or topper. Also, you can sleep on a mattress on the first night, just know the bed may feel different on night two or three.

Does heat help memory foam expand?

Memory foam is sensitive to varying temperatures. In cooler rooms, memory foam can seem more firm. If this is the case, you may want to raise the room temperature a few notches. Once memory foam becomes warmer, it tends to be more flexible and thus expand faster. Body heat can also aid in the expansion process.

How long should you leave a memory foam mattress before sleeping on it?

Once you have received your new memory foam mattress, it is best to open immediately. It takes 4-6 hours for the memory foam to expand 90% and could take another 4-6 hours to get close to full expansion. It is recommended to wait 24 hours before sleeping on it, but don’t worry if you can’t.

So, What Happens if You Sleep on a Memory Foam Mattress Before 24 Hours?

Memory foam is a product that has given rise to the bed in a box phenomenon. Most manufacturers boast about their bed in a box offers. It is completely possible to compress, roll, and even fold a memory foam mattress and place it in a box. No matter what size your mattress is, full size, twin XL, or king, it will fit in a box.

It is recommended to wait 24-48 hours before sleeping on a new, memory foam mattress. It is up to the consumer whether to wait or not. Defects will not be as obvious before the expansion process has been completed, but expansion should not slow down because you slept on your new memory foam mattress.

The short and simple answer is nothing. Your new mattress may not feel exceptional the first night. As the expansion process continues, it will only get better. Once 24 hours have passed, you should have a new bed with what you will call the best mattress you’ve ever owned.

Medical Disclaimer: The information contained on the site should not be used as a substitute for the advice of an appropriately qualified and licensed physician or other health care provider. The information provided here is for informational purposes only.

4 thoughts on “What Happens if You Sleep on a Memory Foam Mattress Before 24 Hours?”

I just purchased my new 4″ memory foam topper with a copper infusion from Walmart. When we opened it, there were no instructions inside. Just wondering if this is normal with the Alllswell king size topper. I can’t wait to try it out, but I wish it had come with a cover. Maybe there is a reason for this. I will leave a review after we have slept on it.

Can You Sleep On A Memory Foam Mattress Before 24 Hours?

First, we’d like to congratulate you on your first mattress in a box. Whether your new mattress is memory foam, latex, or a hybrid, it takes time to expand after unpackaging. You’ve probably heard the myth cautioning you to avoid sleeping on your bed while it expands, but in this article, we explain why that’s not absolutely necessary.

Most companies ask you not to use the mattress until 24 hours after you’ve unboxed the bed to ensure the quality of their product is at its fullest potential when you sleep on it for the first night. But when nighttime rolls around and its time to go to sleep, waiting to use your new bed can be inconvenient.

So, what happens when you sleep on a memory foam bed before those 24 hours are up? In our article, we’ll discuss how long you should really wait before using your foam mattress and what you can do to minimize the wait.

Can I Go To Sleep Right After the Mattress Has Expanded?

Truth is, you can sleep, roll around, and step on your mattress as much as you want while it expands. Regular mattress use will only decrease the material’s expansion time.

If you want to sleep on it before the 24-hour mark, just remember the mattress won’t feel its very best until it expands to its full size. If the first night on your new bed isn’t all you’d dreamed it’d be, give it more time before calling for a return. If a mattress has a ten-inch profile, then you need to wait until it’s expanded to 10 inches tall and the corners have grown to their full shape. If your bed is still uncomfortable after full expansion, then it’s time to call.

A few bloggers suggest waiting to put your mattress protector and sheets on your new bed only after the corners have fully extended. However, in our experience, we’ve found you don’t have to wait for the corners to take shape to go to bed, as you’re typically not sleeping on the corners of the mattress; this lets those corners continue to expand throughout the night. Mattress protectors and sheets are not tight enough to prevent the corners from expanding and should not have an impact on your bed’s expansion time.

There are a few reasons why manufacturers don’t want the bed used within 24 hours of unrolling. The 24-hour rule exists mainly as a precaution to ensure the mattress has fully extended and there’s no damage to the bed’s foam.

However, memory foam fresh out of the box is more versatile than aged foam. Rolling across it won’t do much harm. It the mattress doesn’t assume its original shape after the allotted expansion period, then the foam layers may be defective. Contact the company for exchange or return information.

The second reason why brands want you to wait to sleep on their beds is the risk of off-gassing. Nobody wants to fall asleep on a chemical-smelling bed, and jumping to sleep on a freshly unpackaged mattress may be unpleasant. While most foam mattresses are CertiPUR-US® certified, there still are slight off-gas smells. Letting your bed air out for the allotted time prevents you from dealing with any unpleasant scents.

How Do I Speed Up the Expansion Process?

Constant movement, bodyweight, and heat activate the foam, loosening the material. Laying down on the mattress and rolling around for a few minutes as well as standing on the end of the mattress and walking around the edges should make it expand faster.

My Foam Bed Isn’t Expanding

While some mattresses expand quickly, there are others that have a harder time expanding. If you run into this problem, try activating the memory foam with body heat.

Roll around and walk on the mattress— almost as if you’re giving the bed a massage— and sleep on it for a few days. Afterward, it should expand to its correct size.

The Mattress Hasn’t Expanded After a Week!

If a foam mattress doesn’t expand after five or seven days, then you most likely have a defective bed.

A mattress not expanding is very rare; but if you’ve given your mattress a whole week to expand and it hasn’t, call customer service to inform them of the defect and initiate the return policy.

Taking Care of Your Foam Mattress

Whether you have a hybrid or a gel memory foam mattress, you’ll need to care for it properly to maintain its longevity. Innerspring and hybrid mattresses only need a box spring, whereas memory foam mattresses require a more sturdy foundation. All mattresses, though, need periodic cleaning.

Choosing a Foundation

Foam beds need a solid, flat mattress foundation.

Flexible box springs work well with an innerspring and hybrid mattress; however, a memory foam mattress paired with this type of base will cause the middle to sag, resulting in discomfort.

Memory foam needs a bed frame with either a solid flat surface or a slatted base. Platform beds are a good option, as long as the slats are less than 3 inches apart to prevent the foam material from dipping; this could cause the mattress to deteriorate quickly and product indentations in the material.

Cleaning Tips

Some foam mattresses have removable, machine-washable covers. If you have a mattress without a removable mattress cover, you’ll have to spot clean it with room temperature water mixed with mild detergent.

It’s a good idea to vacuum the mattress at least once a month to remove loose foreign debris and any hair. These same cleaning tricks work on a mattress topper.

Conclusion

You now understand the rules behind allowing a foam mattress to expand and you have a few cleaning tips up your sleeve. You even know what to look for in foundations and bed frames that are best for foam mattresses. To learn more about maintaining your new mattress, read our other guides.

This article is for informational purposes and should not replace advice from your doctor or other medical professional.

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