Key TakeawaysWait Time for Memory Foam Mattresses: When you receive a new memory foam mattress in a box, it’s common for manufacturers to recommend waiting 24-48 hours before using it. This waiting period allows the mattress to fully expand and take on its intended shape. Waiting ensures that any defects or issues become visible, and it gives time for off-gassing, which typically occurs in the initial hours.Sleeping Before 24 Hours: While it’s recommended to wait, sleeping on the mattress before 24 hours won’t ruin it. Manufacturers provide a buffer in their instructions, and in some cases, sleeping on the mattress can even expedite the expansion process. Body heat can make the memory foam more pliable, aiding in quicker expansion.Determining the Right Side and Additional Tips: To determine which side of the expanded mattress faces up, check for a tag or label. The side with the tag should face up when placing the mattress on the bed frame. Memory foam is temperature-sensitive, and warming it can make it more flexible, expediting the expansion process. Raising the room temperature or using body heat can contribute to quicker expansion.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 Mattress 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 mattress 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.Get resources for better sleepSign up for sleep health education, expert tips, and the latest and greatest mattress sales. Email See Privacy PolicyWhat 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.Which Side of an Expanded Mattress Faces Up?When your mattress expands into its full shape, you might find yourself in a little pickle, unsure about which side should be facing up. Not all mattresses are two-sided, especially memory foam ones that are designed for sleeping on only one side. But worry not! There are some nifty tricks that can quickly help you solve this riddle.First off, take a peek at the mattress tag or label that’s attached to it. You’ll usually find this tag sewn onto one side of the mattress. Now, here’s the key: if the tag is there, it means the opposite side, without the tag, should be facing up when you place the mattress on your bed frame.Remember, keep the tag side away from the bed frame or the floor. By paying attention to the tag, you can easily figure out how to orient your memory foam mattress correctly and create a cozy sleeping surface. Simply put, when the tag side faces up, you should be able to read the brand and other information on it.Some mattresses also have a clear design that shows which side is up. For example, a mattress may have a sleek quilted top with tufts and a flat bottom of rough, non-skid fabric. The color scheme may also make it clear which way faces up.But if the tag and mattress design don’t give you a clear answer, try feeling the surface on each side. Even if the mattress looks the same on top and bottom, you can still feel a difference. One side should yield more quickly to your touch—it’s the side with the comfy padding where you’re meant to sleep. The firmer side faces down.If all these methods leave you scratching your head, don’t fret! Reach out to the customer service team of your mattress brand. They’ll be happy to assist you in solving the great mattress mystery.Buying a New Mattress Without OverspendingYou don’t need to break the bank to invest in a new memory foam mattress. We suggest one of these top sales that pop up throughout the year:Presidents Day Mattress SalesMemorial Day Mattress Sales4th of July Mattress SalesLabor Day Mattress SalesColumbus Day Mattress SalesBlack Friday Mattress SalesCyber Monday Mattress SalesFrequently Asked QuestionsHow 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 mattress in a box phenomenon. Most manufacturers boast about their mattress 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.About the author Amy MurphyAmy Murphy has spent the last 7 years experimenting with different apps, exercises, products, and routines to optimize her sleep. From sleep tracking gadgets to polyphasic sleep schedules, she’s tried some of the most unusual recommendations for better shut-eye. As Best Mattress Brand’s lead tester, she’s reviewed dozens of different mattresses and bedding accessories to find her top recommendations. Through her articles, Amy shares the wealth of knowledge she has gained during these experiences so readers can find the best sleep possible. Find more articles by Amy Comments Cancel replyLeave a CommentYour email address will not be published. Required fields are marked * Comment Name Email I agree to the Privacy Policy of this website. Δ