Best King Size Mattress In A Box (2025 Update)

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If you're looking for the best king size mattress in a box, there are a few factors to consider before making your purchase. First and foremost, it's important to consider your sleeping preferences. Do you prefer a soft or firm mattress? Are you looking for a mattress that provides good pressure relief and support? These are all essential factors to consider.

Next, you'll want to think about the materials used in the mattress construction. Most mattresses in a box are made of foam or a combination of foam and springs. Each material has its unique advantages and disadvantages. Foam mattresses are great at minimizing motion transfer and providing pressure relief, while hybrid mattresses offer the stability of coils with the comfort of foam.

Finally, it's helpful to take a look at the warranty and the return policy. While many mattresses in a box come with a sleep trial, it's important to understand how long it lasts and what the process is for returning the mattress if it doesn't work out for you.

When it comes down to it, choosing the best king size mattress in a box comes down to your personal preferences and needs. Are you a side or back sleeper? Do you need a mattress that fits in your budget? These are all questions to consider when making your decision. With so many great options on the market, you're sure to find the perfect king size mattress in a box for your needs.

10 Best King Size Mattress In A Box

# Product Image Product Name Product Notes Check Price
1
The product is ideal for those who want a cool sleep with pressure relief and motion isolation, with a medium firm feel.
2
The product is ideal for those in need of a medium-firm, cooling memory foam mattress in a king size.
3
The product is ideal for those seeking a comfortable and cooling medium-firm memory foam mattress with a long trial and warranty.
4
The product is ideal for providing pressure relief and medium firm support with cooling-gel memory foam in a king size.
5
This product is ideal for those seeking a comfortable and supportive king size mattress with a medium firmness level.
6
The product is ideal for those looking for a medium-firm king-size mattress with foam and pocket innerspring, edge support, and versatile fit.
7
The product is ideal for those looking for a comfortable, cool, and versatile mattress that isolates motion and offers soft to medium firmness.
8
The product is ideal for providing pressure relief, motion isolation and medium firmness for a king size bed.
9
This product is ideal for those seeking a cool and pressure-relieving sleep experience with a king-size mattress.
10
The product is ideal for providing pressure relief and support through individually wrapped pocket coils for a comfortable sleep experience.
The product is ideal for those who want a cool sleep with pressure relief and motion isolation, with a medium firm feel.
The product is ideal for those in need of a medium-firm, cooling memory foam mattress in a king size.
The product is ideal for those seeking a comfortable and cooling medium-firm memory foam mattress with a long trial and warranty.
The product is ideal for providing pressure relief and medium firm support with cooling-gel memory foam in a king size.
This product is ideal for those seeking a comfortable and supportive king size mattress with a medium firmness level.
The product is ideal for those looking for a medium-firm king-size mattress with foam and pocket innerspring, edge support, and versatile fit.
The product is ideal for those looking for a comfortable, cool, and versatile mattress that isolates motion and offers soft to medium firmness.
The product is ideal for providing pressure relief, motion isolation and medium firmness for a king size bed.
This product is ideal for those seeking a cool and pressure-relieving sleep experience with a king-size mattress.
The product is ideal for providing pressure relief and support through individually wrapped pocket coils for a comfortable sleep experience.

1. Blissful Sleep On A Novilla Mattress

The Novilla King Size Mattress is a 12-inch all-foam system that boasts of a 4-layer construction for a comfortable and restful sleep. This mattress is designed to provide optimal support, pressure relief, and breathability for a comfortable sleeping experience.

The top layer of the Novilla mattress is a gel-infused memory foam that keeps you cool throughout the night. The egg crate designed foam layer increases airflow throughout the mattress, ensuring that you stay asleep longer. Additionally, the mattress cover is made of Bamboo fabrics that enhance breathability by up to 30%.

The Novilla mattress is also designed to relieve pain and dampen partner movements. It includes four different foam layers, including gel memory foam and comfort foam, that work together to distribute pressure evenly and mold to your body. The two layers of high-density foam provide support for proper spinal alignment while resisting sagging and preventing roll-off. Whether you sleep alone or next to a partner, there is no disruption.

The Novilla King Size Mattress is made of CertiPUR-US Certified foam, ensuring that it is free of harmful off-gassing and substances like formaldehyde, mercury, and other heavy metals. The bed mattress cover is made of skin-friendly rayon fabric that is heavenly soft to the touch. This ensures that you have a safe and comfortable sleeping environment.

The mattress is delivered in a box and can be easily set up in a few simple steps. It fits all kinds of bed frames, including those placed on the floor. It is recommended that you allow the mattress to air out and reshape for 72 hours after delivery.

In addition to its impressive features, the Novilla King Size Mattress comes with a 100-day free trial and a 10-year protection. This means that you can enjoy this memory foam mattress without any concerns while pursuing your dreams. Novilla also provides professional customer care to address any dissatisfaction problems you may have.

2. Iyee Nature Cool-Gel King Mattress – Sleep Better!

The Iyee Nature 12 inch cooling-gel memory foam mattress boasts a multi-layer design that is sure to provide ultimate comfort and support for a restful sleep. The mattress includes a 2.5" gel memory foam layer, a 2.5" comfort layer, and a 7" high-density base support foam layer that is ergonomically designed for maximum support.

This queen size mattress has medium firmness that is perfect for those who prefer a balance between softness and firmness. The high-density memory foam with added gel factor helps to accelerate air circulation to keep your body cool while you sleep. It also has a slow rebound speed that fits the human body curve for a deep sleep experience like sleeping on clouds.

The Iyee Nature Memory Foam has passed CertiPUR-US and Oeko-Tex Standard 100 Certification, ensuring that it is healthy and skin-friendly. It does not contain harmful substances such as formaldehyde, mercury, and other heavy metals. The soft fabric used in the mattress cover ensures that you can sleep well without worrying about any skin irritation.

For your convenience, the mattress is shipped in a box that has been vacuum compressed. After removing the packaging, the mattress needs 48 hours to fully expand to its original size. We recommend that you try to shake the mattress and pat the surface gently to allow air to enter the sponge, which can help it regain its normal shape.

Iyee Nature has a professional production R&D team and a customer service team that is always ready to provide you with the most cordial after-sales service. If you have any concerns or dissatisfaction with your purchase, feel free to reach out to their team. The Iyee Nature mattress comes with a 10-year warranty and a 30-day no reason return policy to ensure that you have a satisfying shopping experience.

Investing in an Iyee Nature 12 inch cooling-gel memory foam mattress is a wise choice for those who are looking for a comfortable and supportive mattress that is also healthy and skin-friendly.

3. Forever Cool Comfort: Nectar King Mattress

The Nectar mattress offers a 365-night home trial period, which is one of the longest trial periods in the industry. This gives customers ample time to experience the mattress in all four seasons and decide if it suits their needs. Setting up the Nectar is a breeze. Simply move the box to the desired room, unbox and unroll the mattress, and let it expand before your eyes. Within 24 hours, your Nectar mattress will be ready for a good night's sleep.

The Nectar mattress features gel memory foam, which is designed to provide a cool and conforming sleeping surface for every type of sleeper. The foam cradles your body and relieves pressure points, while the dynamic response transition layer offers tailored support. The mattress also features five layers of comfort, including a heat-wicking quilted cover with cooling technology. This ensures that you sleep comfortably, without feeling too hot or too cold.

Whether you sleep on your side, back, stomach, or toss and turn throughout the night, the Nectar mattress provides the perfect level of firmness, coolness, breathability, and comfort. It is also backed by a forever warranty, which guarantees the mattress for as long as you own it. This is the longest warranty period in the industry, and it demonstrates the manufacturer's confidence in their product.

4. Cooling Gel Memory Foam Mattress – King Size.

The Jingwei Gel Memory Foam Mattress is an excellent choice for individuals looking for a cool and comfortable sleeping experience. With its cooling gel particles and super breathable cover, this mattress is designed to keep you cool throughout the night. The open foam construction enhances airflow, ensuring that you remain comfortable even on warm nights.

The 14-inch full mattress features a 4-layer design that provides optimal support and comfort. The top layer consists of 2.5 inches of gel memory foam that conforms to your body, absorbing 95% of your body pressure. The second layer is a 2.5-inch comfortable layer with a unique formula and design that provides a cushioned feel for added comfort. The third layer is a 2-inch soft pressure relief foam that helps to alleviate back pain. Finally, the fourth layer is a 7-inch high-density support foam that provides excellent support from head to toe, creating a medium-firm feel.

The foams used in the Jingwei Gel Memory Foam Mattress meet the highest standards, including CertiPUR-US and OEKO-TEX 100. This means that they are free of unhealthy chemicals like formaldehyde, mercury, and other heavy metals, making it safe for all people, including the elderly and the young.

The Jingwei Gel Memory Foam Mattress comes compressed and packaged in a box, which makes it easy to deliver right to your door. It fits all frames, including box spring, floor, slatted base, flat platform, adjustable bed, and hospital bed. The full mattress dimensions are 54 X 75 X 11 inches.

This mattress comes with an honest 10-year limited warranty and a 30-day money-back return policy, ensuring that you are completely satisfied with your purchase. Please note that it may take up to 72 hours for the mattress to fully expand. If you have any questions or concerns, do not hesitate to reach out to the manufacturer for assistance. Overall, the Jingwei Gel Memory Foam Mattress is a fantastic investment that will provide a comfortable and supportive sleeping experience for years to come.

5. Linenspa Hybrid King Mattress: The Ultimate Sleep Upgrade

The process of setting up your new mattress has never been easier! All you need to do is remove it from the packaging and watch as it quickly decompresses into a comfortable sleeping surface. For those who are eager to start using their new mattress right away, jumping, walking, and sleeping on it can help speed up the process. With this easy and stress-free setup, you will be able to enjoy a good night's sleep in no time.

6. Hybrid King Mattress: Strong Support, Compact Delivery

Introducing the ultimate solution to sleepless nights – the hybrid mattress King size. This mattress is designed to provide a comfortable and uninterrupted sleep experience that will leave you feeling refreshed and energized every morning.

The hybrid mattress King size features a unique pressure-relieving foam layer and high-performance pocket innerspring system that work together to isolate motion, ensuring that you are not disturbed by your partner's movements during the night. This feature is especially useful for light sleepers who are easily woken up by movements.

This King mattress is also designed to provide a cooling and breathable sleep experience. Its soft knitted fabric cover and soft foam layer are breathable and skin-friendly, making it perfect for all sleeping positions, whether you sleep on your back, side, or stomach. The medium-firm feel of the mattress ensures that you are comfortable throughout the night.

In addition, this King-size mattress features a reinforced innerspring system that provides edge support, preventing sagging and ensuring a longer-lasting mattress. This feature is especially useful for those who tend to sit on the edge of the bed or who share the bed with a partner and need extra support.

The hybrid mattress King size is packed in a box through lossless compression technology, making it easy to transport to your room and set up. It fits all bed frames, so you don't need to worry about finding a specific frame that matches the mattress. For a perfect sleep experience, it is recommended to give it 24-72 hours to expand to King size.

In case you are not satisfied with your purchase, the manufacturer offers a 100% satisfaction guarantee and 24-7 support. The product is backed by a team that is ready to do everything they can to make it right for their customers.

7. Sweetnight Sunkiss King Mattress: Gel Memory Comfort

The Sweetnight king size mattress is a flappable option that offers a unique sleeping experience. With four layers of foam, users can choose to sleep on either side of the mattress to meet their individual needs. The top side provides a medium-firm feeling, while the bottom side offers a firmer sensation for those who require it.

Designed with exclusive foam, this king size mattress is divided into three zones that adapt to the shape, size, and weight of any body. This feature provides the perfect level of support and keeps the body properly aligned, relieving pressure and ensuring a comfortable and cooling sleep. The mattress is especially helpful for those with back pain and sweat, thanks to its medium-firm feel.

The Sweetnight king memory foam mattress is made with a gel-infused memory foam and high-density foam that provides 12 inches of comfort and support. It cradles the body, relieves pressure in the shoulders, spine, hips, and feet, and eliminates motion disturbance. It is the perfect bedtime story for a good night's sleep.

The Sweetnight king size mattress is CertiPUR-US certified, ensuring that it is free of unhealthy foam and ideal for a worry-free sleep. The company offers a 10-year promise, making it a fair-priced pillow top king mattress that will suit any budget. Over 96% of customers keep their gel memory foam mattress and refer it to others. It fits all frames, including box springs, floors, slatted bases, and flat platforms.

The Sweetnight mattress is smartly shipped and comes in a box, making it convenient and easy to set up. It is compressed and rolled, so it can be moved through narrow hallways and staircases. The mattress requires 72 hours to recover its original and plush shape, and it is recommended to sleep on it for a few weeks to allow it to "break-in" to the user's sleeping habits.

8. Gel-Coil King Mattress: Perfect Pressure Relief

Novilla's king mattress offers a perfect combination of comfort and support, ensuring you get a restful night's sleep. The hybrid mattress contains memory foam that provides pressure relief, keeping you comfortable throughout the night. The high-quality pocketed coils form a stable support system that gives you the best support your body needs. Regardless of your sleep position, the king size mattresses will relax your spine, hips, shoulders, and lower back.

The memory foam mattress with resilient pocket coils reduces motion transfer, ensuring a disturbance-free sleep. Therefore, you won't be easily woken up by your partner when they move. Sleeping on a king foam mattress provides strong support and firmness without that sinking feel. The king bed mattress features reinforced edge support, so you won't fall off when sitting or sleeping on the edge of the mattress.

The king bed mattress cover is made of skin-friendly fabric with a soft touch sensation. The cooling gel layer with individual pocket springs promotes airflow and transfers more body heat away, maintaining a comfortable sleep temperature, so you won't overheat at night. While the pillow-top mattress layer fits your body curves, providing extra softness and comfort.

Healthy sleep starts with Novilla king mattresses. The memory foam is CertiPUR-US certified and does not release any harmful odor, ensuring a safe sleeping environment for your whole night. The mattress is vacuum-compressed and packed into a box, making it easy to move and install. Just wait for 72 hours for the king hybrid mattress to expand to its original size.

Novilla's 12 inch king mattress is long-lasting and durable. You can enjoy a 10-year warranty and 100-day free sleep trial, ensuring a satisfied purchase with no risk. The king size bed mattress fits all types of beds except for adjustable frames. If you need help or have any inquiries related to their products, their customer service is available to assist you anytime.

9. Coolpressure King Gel Foam Mattress

Introducing the S SECRETLAND 12'' Gel Memory Foam Mattress, designed to provide ultimate comfort for a restful night's sleep. With a three-layered foam construction, including 3 inches of HD gel memory foam, 3.5 inches of HD comfort foam layer, and 5.5 inches of HD base support foam, this mattress offers exceptional support and pressure point relief.

The gel foam layer disperses temperature accumulation to maintain a constant mattress temperature, ensuring a comfortable sleep experience. The high-density base support foam provides surrounding support and responsive relief that helps evenly distribute pressure points in any sleeping position. This ergonomically designed mattress molds to the sleeper's natural shape, offering a balance between firmness and softness.

The mattress includes an ultra-soft washable cover layer that enhances breathability by up to 30%. This unique design allows the memory foam mattress to be shaped into the natural shape of the sleeper while keeping them cool during sleep.

The S SECRETLAND 12'' Gel Memory Foam Mattress ships compressed, rolled, and shipped in a box, making it convenient to deliver to your door and easy to set up. It fits many frames, such as box spring, floor, slatted base, flat platform, or adjustable bed.

As a manufacturer, S SECRETLAND has professional production and R&D teams to offer the best price mattress available. The bed mattress comes with a 10-year warranty, and if for any reason you are unsatisfied, contact their support team at any time for assistance.

Please note that due to the compression, rolling, and shipping process, it may take up to 72 hours for the mattress to fully expand. Other factors, such as cold weather, may also affect the expansion process. However, with its exceptional construction, the S SECRETLAND 12'' Gel Memory Foam Mattress promises to provide a comfortable and restful sleep experience for years to come.

10. Pocket Coils Mattress: Motion Isolation Pressure Relief

The Independently Pocket Spring Mattress is designed to provide a comfortable and supportive sleeping experience. It features individually wrapped coils that move independently and are encased in separate pockets, allowing them to contour precisely to the body and provide consistent distribution of support throughout the mattress. This also lessens motion transfer for sleep partners, ensuring a peaceful and uninterrupted night's rest.

The surface of the mattress is covered tightly, holding the foam on the spring system and providing a plush, skin-friendly fabric for a comfortable touch. Additionally, the tempered steel coil system provides powerful support to each part of the body, catering to the vertebral well-being of the sleeper. The edges are tightly knit and reinforced with foam to maximize edge support, ensuring that the mattress remains sturdy and supportive throughout its use.

The mattress is CertiPUR-US certified, which means it is free of unhealthy chemicals such as formaldehyde, mercury, and other heavy metals. This certification ensures that the mattress is safe and healthy to sleep on, providing peace of mind for the sleeper. Additionally, the mattress comes with a 10-year limited warranty, ensuring that it will provide long-lasting comfort and support.

The mattress ships compressed, rolled, and shipped in a box for easy set-up, making it convenient for customers to receive and set up in their homes. Please note that the frame, foundation, and base are not included with the mattress. The company also offers comprehensive customer service, available seven days a week, ensuring that customers can receive assistance and support whenever they need it.

Best King Size Mattress In A Box FAQs

Are there any king size mattresses in a box that offer cooling technology for hot sleepers?

Yes, there are king size mattresses in a box that offer cooling technology for hot sleepers. One example is the Nectar mattress, which is available in a king size and features a cooling cover made with Tencel fabric that wicks away moisture and heat. The mattress also has a gel-infused memory foam layer that helps regulate temperature and prevent overheating. Another option is the Casper Wave Hybrid mattress, which comes in a king size and features a layer of breathable foam with cooling gel and a layer of perforated latex foam to promote airflow and prevent heat buildup. Additionally, the Layla Hybrid mattress offers a king size option with a copper-infused foam layer that helps dissipate heat and keep sleepers cool throughout the night. These mattresses and others like them offer a combination of cooling technologies to help hot sleepers get a comfortable and restful night's sleep.

Are there any king size mattresses in a box that offer motion isolation for couples?

Yes, there are king size mattresses in a box that offer motion isolation for couples. In fact, many online mattress companies offer king size mattresses that are designed specifically for couples who are looking for motion isolation. These mattresses are often made with high-density foam layers that absorb and isolate motion, allowing one partner to move without disturbing the other. Some of the popular brands that offer king size mattresses with motion isolation include Casper, Nectar, Purple, and Tuft & Needle. It is important to note that the level of motion isolation may vary depending on the specific mattress model and individual preferences, so it is recommended to read reviews and compare features before making a purchase.

How do the prices of king size mattresses in a box compare to traditional mattresses?

The prices of king size mattresses in a box are generally lower than that of traditional mattresses. This is because the manufacturing and shipping costs of bed-in-a-box mattresses are lower due to their compressed and compact packaging. Additionally, bed-in-a-box companies often offer direct-to-consumer sales, cutting out the middleman and reducing overhead costs.

However, it is important to note that there are variations in price within both categories. Traditional mattress prices can vary widely depending on the brand, materials used, and the level of customization. Similarly, bed-in-a-box mattresses can range in price from budget-friendly to luxury options.

Ultimately, the price comparison between the two types of mattresses will depend on the specific brands and models being compared. It is important to do thorough research and compare prices, warranties, and reviews before making a purchase decision.

How does the firmness level of a king size mattress in a box compare to traditional mattresses?

The firmness level of a king size mattress in a box can vary depending on the brand and model. However, generally speaking, most mattresses in a box are designed to have a medium to medium-firm feel. This is because they are typically made with foam layers that offer a balance of support and comfort.

Compared to traditional mattresses, which often have a wider range of firmness levels available, mattresses in a box may not be able to provide the same level of customization. However, many people find that the medium-firm feel of a mattress in a box is comfortable and supportive for a variety of sleeping positions.

It's important to note that the firmness level of any mattress can be subjective and may vary depending on your body type, weight, and personal preferences. When shopping for a mattress in a box, it's a good idea to read reviews and check the firmness level to ensure it will meet your needs.

How easy is it to set up and unpack a king size mattress in a box?

Setting up and unpacking a king-size mattress in a box can be an easy process, provided you follow the manufacturer's instructions carefully. Most of these mattresses come with instructions on how to set them up, and they usually require minimal effort and time.

To set up a king-size mattress in a box, you will need to remove it from the packaging, unroll it, and allow it to expand to its full size. This process can take anywhere between a few minutes to a few hours, depending on the type of mattress and the room's temperature.

Once the mattress has fully expanded, you can place it on your bed frame and add your sheets and pillows. It's important to note that some mattresses may emit an odor when you first unpack them, but this is usually harmless and will dissipate over time.

Overall, setting up and unpacking a king-size mattress in a box is a straightforward process that doesn't require any special tools or skills. With a little bit of patience and attention to detail, you can have your new mattress up and ready to use in no time.

What are the top-rated king size mattresses in a box?

There are several top-rated king size mattresses in a box that are worth considering. One of the most popular options is the Nectar mattress, which features a medium-firm feel and a combination of memory foam and gel-infused foam for optimal comfort and support. Another highly-rated option is the Casper mattress, which has a responsive foam layer for added support and pressure relief. The Purple mattress is also a favorite among customers, thanks to its unique grid-like design that provides a balance of support and comfort. The Tuft & Needle Mint mattress is another top-rated choice, with a plush top layer and a supportive base layer for a comfortable night's sleep. Finally, the Avocado Green mattress is a top pick for those seeking an eco-friendly option, with organic materials and a supportive design. Ultimately, the best mattress for you will depend on your personal preferences and needs, so it's important to do your research and consider factors such as firmness, materials, and customer reviews before making a purchase.

What is the average lifespan of a king size mattress in a box?

The average lifespan of a king size mattress in a box can vary depending on a variety of factors such as the quality of materials used, frequency of use, weight distribution, and personal care and maintenance. However, on average, a good quality king size mattress in a box can last between 7-10 years with proper care and maintenance. It is important to follow the manufacturer's instructions for care and maintenance, which may include rotating or flipping the mattress regularly, using a mattress protector, and avoiding excessive bending or folding of the mattress. Additionally, it is important to consider factors such as the weight and sleeping habits of the users, as heavier or more active sleepers may put more strain on the mattress and reduce its lifespan. Ultimately, investing in a high-quality king size mattress in a box and taking good care of it can help ensure a comfortable and supportive sleep surface for many years to come.

What is the weight limit for a king size mattress in a box?

The weight limit for a king size mattress in a box can vary depending on the brand and model. However, most king size mattresses in a box can support up to 500 pounds or more. It is important to check the specifications of the specific mattress you are interested in purchasing to determine the weight limit. Additionally, it is important to ensure that the bed frame or foundation you plan to use can also support the weight of the mattress and any occupants. If you have concerns about the weight limit, it is always best to consult with the manufacturer or a professional to ensure that you are making a safe and informed decision.

What types of materials are typically used in the construction of king size mattresses in a box?

King size mattresses in a box are designed to be convenient and easy to transport. They are typically made of foam layers that are compressed and rolled into a compact box for shipping. The foam layers used in these mattresses are usually made of memory foam, polyfoam, or latex foam.

Memory foam is a popular choice as it conforms to the shape of the body and provides excellent pressure relief. Polyfoam is also commonly used as it provides support and durability, while latex foam is known for its responsiveness and breathability.

In addition to foam layers, some king size mattresses in a box may also include other materials such as coils or gel-infused foam to enhance support and cooling.

It's important to note that the materials used in a king size mattress in a box can vary depending on the brand and model, so it's always best to check the product specifications before making a purchase.

What types of sleepers are best suited for a king size mattress in a box?

A king size mattress in a box is ideal for couples or individuals who prefer extra room to spread out while sleeping. If you are a side sleeper, a king size mattress will provide ample space for you to stretch out without feeling cramped. Additionally, if you are a restless sleeper or tend to toss and turn throughout the night, a king size mattress in a box can help reduce motion transfer, which means that you won't disturb your partner's sleep. Finally, if you have children or pets who like to join you in bed, a king size mattress will provide plenty of space for everyone to sleep comfortably. In summary, a king size mattress in a box is best suited for those who prioritize space, comfort, and reduced motion transfer while sleeping.

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