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How Long Can a Memory Foam Mattress Stay in the Box?

A memory foam mattress can typically stay in the box for several months, but it’s best to check the manufacturer’s recommendations for specific guidelines.

Are you wondering if it’s safe to leave it in the box for an extended period of time? You’re not alone. Many people have questions about how long a memory foam mattress can stay in the box before it’s no longer usable.

While it may be tempting to leave your memory foam mattress in the box for an extended period of time, doing so could actually be harmful to its integrity and longevity. In this article, we will discuss how long a memory foam mattress can stay in the box, and what you should do if you need to store it for an extended period of time.

Table of Contents

Why Shop Online for a Mattress in a Box?

Mattress in a Box

Boxed mattresses are popular now because of their incontestable conveniences. For instance:

No Travel

The biggest perk about boxed mattresses is that there’s no need to go to a store to find what fits your needs. You only need to select what works for you online, negotiate prices, and someone will bring it to your house or even room if you wish.

A Bargain

First off, boxed mattresses come in numerous budget levels. Also, because there are no delivery fees or a driver to tip, you can save a few coins since you may only have the shipping cost to incur.

Better still, you may incur only the mattress cost if the supplier waivers the shipping cost.

Free Trial

Buying boxed mattresses online is a great way to avoid lying on a bed in the store, under the full watch of salespeople, just to see if it feels right.

Manufacturers let you actually sleep on it in your home for up to 100 days! You can then suggest a free return, an exchange, or a refund if you dislike it and don’t want to keep it.


Thanks to updated machines and technology, it is possible to jam a top-quality mattress into a box! For this reason, they are fuss-free to move, lighter, and easy to unbox. Setting them up in your room is also a breeze!


There’s a whole new collection of mattresses and brands out here for consumers to compare. The options to explore —from size to material to prices—are wild. There’s something for everyone.

When Is the Best Time to Unpack a Mattress?

Unpack Mattress in a box

Now that you have your mattress-in-a-box, hassle-free, unpack it. Manufacturers advise that it is safer to do so as soon as it arrives or within 72 hours.

Also, unboxing as soon as it arrives will allow the mattress to re-inflate and expand sooner, making it easier for consumers to check for potential manufacturing defects.

You get to test it out sooner and decide whether it serves your needs. It is also a great way to avoid surprises with your new buy. If it doesn’t please you, you can return it, ask for a refund or exchange it for another on time.

However, ensure that you unpack it the correct way if you want to accentuate the convenience of buying a boxed mattress in a click!

How Long Can You Keep a Mattress in a Box?

Perhaps you ordered your mattress-in-a-box too soon and aren’t ready to unbox it immediately. How long can it wait?

The duration depends on what brand and type your mattress is. Most manufacturers suggest that a week to three months duration is fine. For instance, you can wait up to 3 months before unboxing a Casper Mattress, whereas the Purple mattress can only stay in a box for up to 2 weeks.

Also, how long you can wait to unbox your mattress depends on factors like sleeper size and weight. Just so you don’t go wrong, unpack immediately.

Risks of Keeping a Mattress in a Box

There are reasons why there’s a time frame for how long a mattress should stay in its delivery box. You’ll run potential risks if you wait for way too long to unpack a boxed mattress.

1. Risk of Damage

You risk damaging the properties of the multiple layers of foam in your mattress if it stays in compression for too long.  If your mattress spends too much time in compression, the memory foam loses contouring integrity, affecting its firmness.

Moreover, the compression may deny your foam mattress necessary air circulation and cause the accumulation of moisture, which is a catalyst for bacteria, molds, and dust mites.

2. The Mattress Can Become Uncomfortable

There’s too much encasement, folding, and rolling when packing a mattress-in-a-box for delivery, enough to affect its structure if it stays that way for long.

It might fail to take its full foam, compromising the support and comfort you expect your mattress to provide. 

3. Trouble Expanding

How soon your new mattress expands back to its full foam depends on how long you leave it in its delivery box. Most brands take close to 72 hours to get fuller.

However, your mattress can get its full foam faster than that if you unbox it faster. The longer it stays in the box, the longer it takes to decompress.

4. Warranty Issues

You can invalidate the manufacturer’s warranty conditions if you wait until it’s too late to unbox and the mattress gets damaged.

Imagine losing twice over – first by denying yourself the comfort and support you expect and then not qualifying for a refund or exchange.


Can I store a memory foam mattress in a different container?

It is possible to store a memory foam mattress in a different container, but it is important to make sure that the container is appropriate and sufficient for ensuring the mattress’s shape and quality. 

Memory foam mattresses are typically compressed for shipping, so it is important to not compress them again when storing. The container should be dry, clean, and large enough to accommodate the mattress without bending or folding it. It is also recommended to cover the mattress with a protective cover or sheet to prevent any damage or dirt.

What should I do if my memory foam mattress has been in the box for too long?

If your memory foam mattress has been stored in its box for too long, it may take some time for it to fully expand and return to its original shape. 

The first thing you should do is carefully remove the mattress from its packaging and let it sit in a well-ventilated room for at least 24-48 hours. During this time, the mattress will slowly expand and rid itself of any odors that may have developed while in storage. 

You can also try gently massaging the foam to help it regain its original shape. If you notice any unusual or persistent odors, you may want to consider using a mattress protector or airing the mattress out for a longer period of time.

Can a memory foam mattress be re-compressed and stored in the box again?

Yes, a memory foam mattress can be re-compressed and stored in its box again. Memory foam mattresses use a special foam technology that allows them to be compressed and rolled up for easy shipping.

Once the mattress is removed from the box and unrolled, it will slowly expand to its full size over a period of hours. However, if you need to move or store the mattress again, it is possible to compress it back into the original box. You will need a special machine to do this, such as a vacuum compressor or a rolling machine, but it is possible and will not damage the mattress.

Keep in mind that compressing the mattress repeatedly may affect its overall longevity and comfort, so it is best to do it only as needed.

Is there an ideal room temperature for unboxing and using a memory foam mattress?

While there is no specific ideal room temperature for unboxing and using a memory foam mattress, it is generally recommended to keep the room temperature between 60 to 72 degrees Fahrenheit. This is because memory foam mattresses can be affected by temperature changes, and extreme temperatures can either make the mattress too hard or too soft. 

Additionally, it is important to let the mattress settle for at least 24 hours before using it, regardless of the room temperature, to allow the foam to fully expand and eliminate any potential off-gassing odors. 

How long can I store a memory foam mattress in the box before it becomes unusable?

It is generally advisable not to store a memory foam mattress in the box for more than three months to ensure optimal performance and durability. Consult the manufacturer’s recommendations for accurate guidance.

Can I roll the memory foam mattress back into the box after unboxing?

Once a memory foam mattress has been unboxed and allowed to expand, it is not recommended to try rolling it back into the box, as this can damage the foam and affect its performance.

What should I do if my memory foam mattress has an odor after unboxing?

Odors are common with memory foam mattresses due to their composition. Allow the mattress to air out in a well-ventilated room, and the odor should dissipate within a few days.

How long does it take for a memory foam mattress to expand completely?

The time required for a memory foam mattress to expand fully varies based on factors such as thickness and composition. It typically ranges from a few hours to a couple of days.

Can I sleep on the mattress immediately after unboxing?

It is best to allow the memory foam mattress to fully expand before using it. Follow the manufacturer’s recommendations for the specific duration.

How Long Can You Store a Memory Foam Mattress?

Users love a memory foam mattress for its resilience. But, the foam’s resilience wears off after a while, especially if it stays in compression for too long.

Different suppliers offer varying specifications about how long you can store your memory foam mattress while in compression. Most estimates suggest storing it for up to 3 months without damage.

However, it can be difficult to come by such instructions sometimes. So, storing your new memory foam mattress compressed for only a few weeks is imperative, whether boxed, rolled up, or wrapped in packages.


Nothing compares to coming home to the comfort of a supple memory foam mattress after a hard day. So, if you don’t intend to leave your mattress in a box longer than you should, go ahead and order it.

Author: Jessica

Jessica is a lover of both life and gardening. She loves to share his passion for both on social media. He often posts about his latest gardening projects, as well as tips and tricks for others who might be interested in starting their own gardens. She also frequently posts about the different aspects of his life that he enjoys, from spending time with friends and family to exploring new places.

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