After purchasing a new mattress it becomes a common matter of concern, how long does it take for a memory foam mattress to inflate?

A few days ago, I ordered a new memory foam mattress. The mattress was so thin that I became very disappointed right after unpacking my order. It was ten times thinner from my desired mattress, gross, right? Then I did some research about the inflation process and timing of memory foam mattresses.

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Generally, a mattress comes in a compressed rolling pack for convenient shipping. To inflate the mattress in its widespread size, manufacturers recommend waiting for 24-48 hours. The timing is not fixed for every memory foam mattress. It depends on the foam quality and consumer’s room warmth, mainly.

Let’s explore the details of what actually transpires and what you need to do to inflate your mattress properly.


It’s natural to take time for a new memory foam mattress expanding. Sometimes it winds up quickly or sometimes it takes a huge time. But overall 72 hours is more than enough to blow up a new mattress. If you have been waiting for 72 hours but still notice deflection in your mattress, it is really unexpected.

In the worst scenario like this, you can try using an iron to inflate it properly as heat makes the expansion process faster. Move the iron back and forth through the memory foam and put pressure on the mattress with iron. Heat release the bond and help to inflate quickly. Do this part very carefully, a little bit of unconsciousness can burn your foam.

Ironing a little part of the mattress where you notice deflection is quite easier. In addition, you can also iron a small mattress like a baby crib mattress comfortably but ironing a whole king or queen size mattress is too difficult. Most importantly using excessive heat throughout the whole mattress can damage the foam material.

So, it is highly suggested that you should observe the mattress precisely. If the mattress seems too thin after 72 hours waiting, it’s better to contact your mattress manufacturer. Make sure you use iron after a long time waiting and when the mattress is almost 70-80% expand.

Ironing is a quick remedy for the expanding process. It won’t be applicable at the initial stage. So, be careful before putting iron heat. A simple mistake can create difficulties for your return policy.


After buying a new mattress, consumers become puzzled with some common issues. In this section, you will get some clear cut answers to those frequent questions.

How Long Can I Store My Mattress in the Box?

You have already received your mattress but you can’t get enough time to open the box. Or Right now your bed is not ready for adjusting the mattress? Naturally, it comes in your mind that how long you can leave it in the box.

You can leave it for 2 months in the box. Your mattress will be okay for 2-3 months while your mattress is compressed and unwrapped in the box. But it is better to unwrap the mattress as soon as possible as we don’t know the packaging time duration exactly. Being rolled and compressed tightly in a vacuum box, mattress foam quality can be damaged.

Does Heat Help Memory Foam Expand Faster?

Yes, it is. Heat impacts a lot to expand memory foam. If the consumer’s room temperature remains cold, the expansion process of the foam can be slowed down. At that time increasing room temperature by a heater or external heat implementation can help to speed up the process.

Heat can decompress the bonding and make it easy to inflate the mattress fully. As a result, the mattress can inflate in the right size.

What Should Do When Memory Foam Mattress Corners Not Expanding?

I faced this problem too. There is a quick remedy here. Plugin your iron heat it for 30-40 seconds and press it from side to side of the mattress. You can see your mattress corners also become fluffy like the rest part of it. Be aware that the heat will not be raised too much. It can burn your foam.

Can You Sleep on a New Mattress After Unpacking It?

No. You shouldn’t do this anymore. Give at least 12-24 hours to expand your mattress then you can sleep on it comfortably. Some mattresses foam quality remain so good and they are able to inflate much quicker than traditional memory foam mattresses. 

If you become sure your mattress expands almost 90%, you can enjoy your sleep on it. Your body heat will help to complete the rest expansion.

Why is It Recommended to Wait 24 Hours Before Sleep?

Almost every mattress manufacturer recommends waiting at least 24 hours before sleeping on a new mattress. This particular time is important for inflating the mattress in its actual size.

Without proper expansion, you cannot enjoy the exact comfort of your memory foam. Moreover, the proper expansion is most important to detect the cracking and splitting of your memory foam layer.

If the mattress is not properly expanded, you will not be able to explore the defect as well. Once you miss the trial period, the manufacturer will not want to cooperate with you.

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Another important cause of waiting is to reduce the chemical smell. A memory foam mattress contains various chemical materials. Due to being compressed and wrapped in a vacuum box the chemical smell remains stuck into the mattress. After unwrapping the plastic it needs some couple hours to fade and disappear the strong chemical smell from the mattress. 


Is the above article helpful to get your desired information? If the question is yes, we will happy to know which particular answer helps you? 

In addition, let us know if you have any questions about the mattress and other sleeping accessories. Sleeping fellow team always ready to provide you authentic information.