Top 15-Inch King-Size Mattresses

Our review process

No more spending hours trying to figure out which 15-inch king-size mattress to get! By reading this article, you'll have an excellent understanding of what kinds of mattresses are on the market, so you can confidently purchase a mattress that will ensure comfortable sleep for years to come.

Before you choose your new 15-inch king-size mattress, we think here are some things you'll want to know. These mattresses are designed to spaciously fit couples, providing maximum space for two people to sleep comfortably. They measure 76" X 80" and are great for master bedrooms. However, they are not ideal for small areas, taking up a majority of the free space in the room. Also, they are large and heavy, making them difficult to transport and flip. These mattresses are built with a strong build, making them more durable and able to sustain more weight. They are less likely to sag, so the surface will remain level to ensure proper support. However, they can be quite heavy, so you'll need at least two people to flip them over.

Our Top Ranking Mattresses:

	Product Name	Brand	Type
Best Overall Score 1	Milton Greens Stars 5055 EK Firm Pocketed Coil King-Size 15-Inch Mattress	Milton Greens Stars	pocketed coil
Runner Up 2	Restonic Pillow Top King-Size 15-Inch Mattress	Restonic	pillow top
For Side Sleepers 3	Milton Greens Stars 5059 EK Pocketed Coil King-Size Pocketed Coil® Technology 15-Inch Mattress	Milton Greens Stars	pocketed coil
4	Mlily Bliss Soft Memory Foam King-Size 15-Inch Mattress	MLILY	memory foam

Our Top Ranking Mattresses

Best Overall Score

Milton Greens Stars 5055 EK Firm Pocketed Coil King-Size 15-Inch Mattress

Customer Rating

Brand

Milton Greens Stars

Type

pocketed coil

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Runner Up

Restonic Pillow Top King-Size 15-Inch Mattress

Customer Rating

Brand

Restonic

Type

pillow top

Buy now on Amazon

For Side Sleepers

Milton Greens Stars 5059 EK Pocketed Coil King-Size Pocketed Coil® Technology 15-Inch Mattress

Customer Rating

Brand

Milton Greens Stars

Type

pocketed coil

Buy now on Amazon

Mlily Bliss Soft Memory Foam King-Size 15-Inch Mattress

Customer Rating

Brand

MLILY

Type

memory foam

Buy now on Amazon

Best Overall Score

Milton Greens Stars 5055 EK Firm Pocketed Coil King-Size 15-Inch Mattress

5.0 by user reviews

For a better night's sleep and endless comfort, select a Milton Greens Stars Firm Pocketed Coil King-Size Mattress. This thick mattress has a firm comfort level, which provides the support necessary to keep your body straight. It has a supportive design, aligning your spine horizontally when sleeping on your side. It features a 15-inch thickness, resulting in a bulky appearance that can be off-putting for some. It is available in a king-size, so you can have as much personal space as possible. It has a pocketed-coil construction, which can accumulate dust more easily. It features a quilted cover, which stretches to fit a large mattress perfectly.

Pros

Firm mattress helps your body maintain good posture to prevent your back from curving
Supportive design ensures proper spinal support and alignment
King-size is perfect for rooms with plenty of space

Cons

King-size can be difficult to move
Firm mattress can put uncomfortable pressure on pressure points
15-inch thickness can appear too large in some bed frames

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Runner Up

Restonic Pillow Top King-Size 15-Inch Mattress

5.0 by user reviews

For serious comfort and a restful night's sleep, select the Restonic Pillow Top King-Size Mattress. This Restonic mattress has a supportive design, aligning your spine horizontally when sleeping on your side. It provides pressure point relief, so any discomfort is diminished because of essential joint support. This Restonic mattress is available in a king-size, so you have a lot of space to sleep well. It features a 15-inch thickness, meaning it might not fit all bed frames. It has a pillow top construction, adding support and relieves back pain.

Pros

Supportive design ensures proper spinal support and alignment
Offers pressure point relief to increase comfort and alleviate pain
King-size is ideal for areas with plenty of space

Cons

King-size can be difficult to move
15-inch thickness may tend to appear too large in some bed frames
Pillow top construction has questionable durability

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For Side Sleepers

Milton Greens Stars 5059 EK Pocketed Coil King-Size Pocketed Coil® Technology 15-Inch Mattress

5.0 by user reviews

The Milton Greens Stars Pocketed Coil King-Size Mattress is a good choice for anyone who wants to keep their pressure points supported. This Milton Greens Stars mattress has a supportive design, aligning your spine horizontally when sleeping on your side. Available in a king-size, it ensures that you'll have a lot of room to spread out and have a good night's sleep. It features a 15-inch thickness, resulting in a bulky appearance. Featuring a pocketed-coil construction, this Milton Greens Stars mattress decreases disturbance from your partner's movement.

Pros

Supportive design ensures proper spinal support and alignment
King-size will provide maximum bed space

Cons

King-size can be difficult to move
15-inch thickness can tend to appear bulky in some bed frames
Pocketed-coil construction can accumulate dust more easily

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Additional Picks

Mlily Bliss Soft Memory Foam King-Size 15-Inch Mattress

5.0 by user reviews

For a better night's sleep and ultimate comfort, opt for a Mlily Bliss Soft Memory Foam King-Size Mattress. With a memory foam construction, this MLILY mattress reshapes itself to your body as you move around at night. It has low VOC emission fabric so that you won't be breathing in toxic chemicals while sleeping. Providing pressure point relief, it helps to relax strained muscles and joints and ensures that your body is fully supported.

This MLILY mattress is available in a king-size, so you have ample space to sleep comfortably. It features a silk cover, staying temperature neutral, warm in cold weather and cool in hot weather. It features a 15-inch thickness, resulting in a bulky appearance that can be off-putting for some. Featuring a soft comfort level, it will provide the right amount of support, particularly for those who prefer to sleep on their side. It is made without PBDEs, TDCPP, or TCEP, protecting you and your family from the harmful effects of harsh toxins.

Pros

Soft mattress is ideal for people who enjoy sleeping on their sides
Comes with a silk cover, staying temperature neutral, warm in cold weather and cool in hot weather
Emits low levels of VOC, making it an eco-friendly option with less overall toxin exposure

Cons

King-size can be difficult to move
15-inch thickness can tend to appear bulky in some bed frames
Memory foam construction potentially releases VOCs

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Need Help Narrowing Down Your Options? Here's Some Additional Information to Consider:

Picking Your Mattress Type

Memory Foam Mattresses

If you're thinking about getting a memory foam mattress, this 15-inch king-size mattress could be a good choice. These mattresses come with pressure-point relief, which helps ease any tension in your joints. Built of various materials, they will provide the just the right amount of comfort for a great night's sleep. Featuring superior motion isolation, they are perfect for couples with a restless sleeper. However, they aren't waterproof, so you'll want to be extra careful and make sure that they don't come into contact with too much moisture. In addition, these memory foam mattresses can smell a bit like chemicals initially, so you should air them out for at least 24 hours before adding sheets.

Pillow Top Mattresses

If you're looking for the perfect balance between firmness and softness, you might want to consider getting a pillow top mattress. This is one for you to take a look at. These pillow top mattresses are designed with various coil types to offer firm to plush support for extra give. Moving heat away from your body, they will allow you to stay cool all night. Featuring an extra layer of padding, they will allow for the appropriate cushion. They have a layer stitched to the top of the mattress, which separates the pillow-top from the comfort layer, resulting in a balance of firmness and softness. They have pressure-point relief, which helps alleviate any tension in your joints. These mattresses have enhanced motion isolation, so your partner doesn't wake you with their movements in the morning. One downside is that they can smell a bit like chemicals initially, so you should air them out for at least 24 hours before adding sheets. Another drawback is that they are expensive, so if you're looking for a more affordable mattress, you should consider something else.

Pocketed Coil Mattresses

Looking for a mattress that will support sensitive pressure points? We have two 15-inch king-size mattresses for you take a look at, just like this one. These mattresses move heat away from your body, keeping you cool throughout the night to improve the quality of your sleep. They feature firm edges, which will support the sides of the mattress for even better stability. These breathable pocketed-coil mattresses will provide proper airflow and ventilation to prevent moisture build-up. They have pocketed coils, so you can experience maximum support. Made from various materials, they will provide the just the right amount of comfort for a perfect night's sleep. They have enhanced motion isolation, so your partner doesn't wake you with their movements in the morning. Pretty sure that a pocketed coil mattress is what you're looking for? You might find this one to be the right choice.

The Comfort Scale

Firm Mattresses

Are you searching for a firm mattress? A 15-inch king-size mattress could be a good choice for you. Improving circulation, firm mattresses promote deeper sleep. They evenly distribute your weight, which will allow for proper weight distribution. They have an indentation load deflection ranking of 34-36 pounds and are perfect for those who find it more comfortable to sleep on their back. Something to consider is that they can be uncomfortable if you're not accustomed to sleeping on hard surfaces, so it can take some time to get used to them. In addition, they can put strain on specific pressure points, so if you want a mattress that relieves pain in pressure points, this is not the mattress for you.

Soft Mattresses

Are you searching for a soft mattress? A 15-inch king-size mattress might be a good choice for you. With added support, soft mattresses are ideal for those who suffer from back problems or joint pain. They are suitable for people who sleep on their sides and feature an indentation load deflection ranking of 19-21 pounds. They give contouring support, adjusting to your body shape for optimal comfort. Something to keep in mind is that they are more likely to become a bit lumpy or sink in over time, so it's possible that they'll be less supportive and comfortable since your body won't be aligned well. In addition, the surface will become softer over time, so they'll wear down quicker than other kinds of mattresses and you'll probably want to replace them sooner.