Mattress 101

How Long Does It Take to Break in Your New Mattress?

By Alesandra Woolley

Believe it or not, breaking in your new mattress can take up to 30 days…and in some cases, even longer. In a society that values instant gratification, this isn’t always the news that people want to hear. But if you think about the amount of time you’ll likely own your mattress for (7-10 years), waiting 30 days until it’s just right doesn’t seem so bad.

We’ll help you understand why it’s so important to break in your mattress, give you some tips for breaking it in, and help you determine if (and when) it might be time for a change.

Woman breaking in her new mattress

Why do you need to break in your mattress?

Breaking in your mattress is often compared to breaking in a new pair of shoes: it takes time and patience and yes, even the occasional blister. But sometimes those shoes turn into your best, most comfortable pair and the break-in period was well worth the wait. Well, the same thing is true for mattresses. As much as you want to love and embrace your new, well-earned mattress as soon as it’s set up in your bedroom, it might not feel like blissful slumber after the first night.

That’s because you and your new mattress are still getting used to each other. The materials in the mattress need time to fully take shape – to soften and flex into their natural, intended firmness. Your mattress will start conforming to your body shape and adjusting to your movements and sleeping positions, but this won’t happen immediately.

Your body is also getting used to this new sleeping surface. With any new mattress, it’s going to feel different than the mattress you’ve been sleeping on for years. If you bought a different type of mattress, (e.g. you had an innerspring and now you have a memory foam mattress) your body will need to readjust to the new materials and new feel of your mattress. It’s important not to confuse “uncomfortable” with “unfamiliar” when it comes to breaking in your mattress.

Dr. Scott Bautch, President of the American Chiropractic Association’s Council on Occupational Health, put it best: “When you transition to a new mattress that you aren’t used too, just because you can’t get comfortable for a week or two doesn’t mean you are sleeping on a bad mattress. You need to have realistic expectations. If you go from a really bad mattress to a better one, you are going to have a break in period.”

8 tips for breaking in your new mattress

While breaking in your new mattress won’t happen overnight, there are some tips you can follow to help make the process a little smoother, and in some cases, faster.

1. Give it some air.

Once your new mattress springs to life, it may look like it’s ready to use, but often times it’s just been freed from being compressed in a plastic casing. Many new mattresses can give off a slight chemical odor when you first open it, which is totally normal. Before you throw on your sheets and hop into bed, it’s best to give your mattress a few hours to air out. Opening the windows or putting on a fan helps. The smell of a new mattress can have an impact on the quality of your sleep the first night, which can actually put a damper on your overall feelings about it. So let it breathe first, and then start putting it to the test.

2. Sleep in it consistently.

If you’re not sleeping as well as you expected to after the first few nights on your new mattress, your first instinct might be to migrate to the couch. Resist the urge. The more consistently you sleep on your mattress, especially within the break-in period, the better (and faster) your body will start adjusting to your mattress and vice versa.

3. Put it on the right foundation.

Often times when people purchase a new mattress, they put it right on top of their old bed frame or foundation. Having the right level of support for your mattress can have a big impact on how comfortable that mattress feels, especially during the initial break-in period. And if your old foundation is worn and unstable, you’re probably not experiencing the mattress the way it was intended. Pay attention to the type of bed frame or foundation that’s recommended by the company you bought your mattress from. (We list this out for you on all of our review pages.)You can also find some of our favorite foundations and bed frames in this article if you’re in the market for a new one.

4. Give it more pressure.

It may sound (and look) a little silly, but walking or crawling around on your mattress can actually help break it in a little faster. The additional pressure helps to loosen the materials in the mattress and speed up the process of taking its intended shape.

5. Turn up the heat.

Not that kind of heat. (Although if we’re being honest, heated bedroom activity doesn’t hurt when breaking in your mattress.) But here we’re talking about the actual temperature of the room here. Heat can be helpful for the break-in process, particularly if you purchased a new memory foam mattress. It can help soften up the materials and speed up the break-in period. And you don’t have to turn your bedroom into a sauna either – even a few ticks up on the thermostat can help.

6. Talk it out.

If you’re sharing your new mattress with someone else, having an open conversation about your quality of sleep and how you’re feeling on the mattress can help with your collective decision to keep the mattress or not. While it may not physically help break it in, it could help make you more aware of things you might not notice. For instance, maybe your sleeping partner is starting to notice that he/she is waking up with less back pain, and you start to realize the same is true for you.

7. Give it the full time.

Some mattress companies will not even accept returns until after you’ve slept on the mattress for a full 30 nights. And there’s a good reason for that. While it may seem like a long, tedious process, it’s better to wait and see if the mattress adjusts to your body and becomes more comfortable before you initiate the return process and start looking for a new one. In some cases, the break-in period can last even longer than 30 days, so it’s a good idea to check with your mattress company on the recommended time frame.

8. Follow your gut, but not your first impression.

Having a comfortable mattress is critical to your quality of sleep, so if your gut is telling you this just isn’t going to work out and you’re waking up in pain every morning, then by no means should you suffer through the rest of the break-in period. But your first impression may not always be indicative of how comfortable you’ll feel on the mattress. That’s why laying on a mattress for a few minutes in a mattress store doesn’t give you an accurate representation of how well you’ll sleep on that mattress long-term. So don’t be let down if your mattress doesn’t end up being what you expected it to be – there’s really no way to know until you try it…for a good while.

What if your mattress still isn’t comfortable after the 30-day break-in period?

If you’re still not completely satisfied with your mattress after breaking it in for 30 days, there are a few things you can do.

  • Wait a little longer. If you’re still not in love with your new mattress but aren’t ready to give up just yet, there’s no harm in giving it more time, as long as your trial period allows it. Most mattress companies offer trial periods that are 100+ nights for that very reason. So feel free to take advantage of this and give it a couple of more weeks. Depending on the type of mattress you have, you might actually need more than 30 days to get the full effect.
  • Exchange it for a different feel. Often times when mattress companies offer more than one model or varying levels of firmness, they’ll allow you to exchange your mattress for something more or less firm depending on your liking. If you’re waking up with pain or numbness in your pressure points, then you might need something a little softer. If you’re finding it hard to get out of bed or starting to develop lower back pain, you might want to opt for a firmer mattress. You can also read more about how to choose your mattress firmness here.
  • Return it for a new one. You may feel defeated if you ultimately decide to return your mattress after the break-in period, but it happens to lots of people. Think of it as a learning experience – now you know what you want (and don’t want) in a mattress and can make a more informed decision next time around. And if you ordered from a company with a risk-free return policy, you really have nothing to lose. If you decide to send your mattress back and get a new one, our mattress guide can help you find your next bed!

Breaking in your mattress can seem like a doozy, but sometimes good things take time. If you have any questions about breaking in your mattress or have some of your own tips to share, drop us a line in the comments below.

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Comments (9)

  1. Hello. Is there a mattress topper you recommend for a new firm memory form mattress? My entire body hurts from this new bed. It’s way too firm. Also, what pillow should I use. I’m a side/stomach sleeper.

  2. I’ve been sleeping on a Caspar for 3+ years and loved it. Switched to a Leesa (because I needed another size, they seemed similar enough and a bit cheaper), and ended up with a herniated disc in my lower back within the first 4 weeks. I’m not sure I can fully contribute it to the new mattress, but I must confess I don’t sleep comfortably. It feels like my but sinks in and I end up arched (both, when laying on the side and back). My intuition is to go for a firmer mattress (which one???), but a comment above suggests to maybe go for something fluffier? I’m confused 🙂

  3. We just got a new innerspring after a defective hybrid matress exchange. We ith slept horrible the first night. It doesnt feel remotely like the matress we tried in the store. It is so rigid. Is this just newness?

    • Hi Mischa – we’re so sorry to hear about your sleeping experience on your new mattress! Believe it or not, it can sometimes take up to 30 days to break in a new mattress. However, if you’re continuing to sleep poorly and waking up in pain, it might be a good idea to start looking at your return policy and warranty details. You deserve a good night’s sleep!

  4. Hey there,

    We purchased a medium feel mattress recently (started with firm, that was too tough). My lower back pain is pretty bad, it doesn’t feel very well supported and feels like my hip area sort of sinks into the bed where as everything else stays afloat, leaving an arc in my back. Could this just be due to the added support my body is getting used to? Still sore after 12 nights. Thanks!

    • Hi there – so sorry to hear about your mattress experience and back pain – that’s never fun. One quick thing you might want to try is adding a plush mattress topper. That might help alleviate some of the soreness you’re feeling in the short-term but if you don’t feel like your bad is being evenly supported, then it might be time to start shopping for a new one. What you’ll want to look for specifically are mattresses that are responsive and provide good spine alignment. We’ve seen the Sapira and the DreamCloud score particularly well in these areas. Hope that helps and good luck!

  5. I just purchased a top quality latex mattress to replace my 13-year old pillowtop. The softness/firmness level was 5 out of 10 (medium). I woke up this morning (first trial) with lower back pain. Although the conventional wisdom says I need a former mattress, my pillowtop was softer but didn’t give me back pain. Not sure if I should return or give it a few more days.

  6. I seem to only sleep well on very firm mattresses. We just bought a sleep number bed for couples and even on the firmest setting, I’m waking up with back pain. It seems like the breaking in period applies to mattress that need to be softened up, not firmed up. Should I bother suffering through a break in period?

    • Hi Leana! You may want to try adjusting the settings to be a little bit softer and see if that helps with your back pain. You certainly shouldn’t be suffering through your break in period, so if that doesn’t help then it might be time to look for a new one. We’ve heard from many people who prefer firmer mattresses that switching to slightly softer mattresses or even a softer topper can help. Good luck!


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