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Best King Size Mattress

Updated March 27, 2021

Without a doubt, there is nothing more important in your bedroom than the mattress itself. Choosing the right mattress can be hard, since it’s not a short-term investment.

A king-size mattress is an investment you don’t want to mess up. There should be abundant support, plenty of space, and most of all, the luxurious experience that comes with a quality king mattress.

In this article, we’ll take you through all the musts and features of a top-tier mattress, then present you with some hand-picked favorites to help you get started on the journey of finding the perfect mattress.

Rank Product Highlights
#1 Sweetnight 12-inch Plush Mattress

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  • Mattress Firmness: Medium-Firm
  • Mattress Thickness: 12 inches
  • Mattress Type: Hybrid Innerspring and Foam
  • Cover Material: Quilted Knit Pillow Top Cotton Rayon Cover
  • Layers: 5; Knitted cotton cover, Air-Flow High-Density Foam, Gel Memory Foam, Air-Flow High-Density Foam, Wrapped Pocketed Steel Coils
#2 Novilla 10-inch Gel Memory Foam Mattress

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  • Mattress Firmness: Medium-Firm
  • Mattress Thickness: 10 inches
  • Mattress Type: All-Foam Mattress
  • Cover Material: Rayon Cotton
  • Layers: 4; Cotton Rayon & Bamboo Fabric Cover, Comfort Foam, Gel Memory Foam, High-Density Memory Foam
#3 Zinus 14-inch Gel Memory Foam Mattress

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  • Mattress Firmness: Medium Plush
  • Mattress Thickness: 14 inches
  • Mattress Type: Hybrid Mattress
  • Cover Material: Not mentioned
  • Layers: 5; 1.25 inches Comfort Foam, 2 inches Gel-Infused Memory Foam, 1.75 and 1.25 inches ViscoLatex Foam, 2 layers of 0.5 inches of High-Density Foam, 7.5 inches Encased Coiling
#4 Vibe 12-inch Gel Memory Foam Mattress

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  • Mattress Firmness: Medium-Plush
  • Mattress Thickness: 12 inches
  • Mattress Type: All- Memory Foam
  • Cover Material: Not Mentioned
  • Layers: 3; 3 inches Gel Infused Foam, 2 inches Gel-Infused Memory Foam, 7 inches Conforming High-Density Base Foam
#5 Classic Brands Cool Gel 1.0 Ultimate Gel Memory Foam 14-inch Mattress

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  • Mattress Firmness: Medium Plush
  • Mattress Thickness: 14 inches
  • Mattress Type: All-Memory Foam Mattress
  • Cover Material: Cotton Quilted Stretch Knit
  • Layers:  3; Cool Gel Memory Foam, Comfort Foam, High-Density Base Foam

When is it Time to Buy a New Mattress?

There are always little hints your mattress will give you to indicate the need for a new one. Listed below are some of the obvious ones that are always a good idea to watch out for.

• Age Limit of a Mattress

There is no one determinant for when to purchase a new mattress. Deterioration, clumping, ripping, staining, loss of loft and support are all reasons to throw out the old mattress and search for a new one.

One of the most basic reasons to change your mattress is lifespan. A simple rule to follow is to change your mattress every seven years. You may not notice the mattress wearing down over so long a time, but you will once you lie down on a newer, fresher mattress.

Here are the some pointers on How to Determine If Your Mattress Is Too Old.

• Discomfort, Aches and Pains

Your mattress is meant to be a comfortable and supportive bed to sleep on. If you find that rather than relaxed, you wake up stressed and sore, then perhaps it’s time to shop for a newer mattress.

A woman in white with her back turned holding her lower back at the edge of the bed because it hurts

• Sagging, Clumping, and Deformation

Your mattress will deform, after every use. You sleep on it for around eight hours in a row, after all. The red flag goes up once your mattress stops bouncing back to shape overtime, developing clumps of filling and sags around the sides and/or middle.

• Your Body’s Needs and Requirements

As you grow older, your body might require a different amount and type of support. Weight loss or gain could mean you prefer either a firmer, or plush mattress.

Going from sleeping alone to sleeping with a partner is also a big change worth considering, since you have to find the middle ground where you’re both comfortable.

It’s also important to consider any medical diagnoses you may have recently been given, especially in terms of sleep disorders. This can change what type of mattress is beneficial or harmful to your health.

Sleeping Types

— Sleeping Positions

There are three sleeping positions that you can sleep in; on your back, on your front, and on your side. Back and stomach sleepers sleep better when they have a firm mattress. If you sleep on your side, however, a softer mattress is ideal, since it’ll conform and adjust to your specific body size and type.

— Hot or Cool

Different materials retain heat differently. If you prefer sleeping with latex and foam, then you’ll have a warmer night’s sleep since they retain more heat and have less airflow.

A solution to this is to invest in a gel-infused foam mattress, which comes at a higher price. Hybrid or innerspring mattresses generate more airflow, so it’s cooler to sleep on these types of mattresses as well.

— Weight

Finally, there is your own weight. A heavier sleeper might prefer a firmer option that doesn’t sag or deforming as quickly. This will provide greater support to the sleeper and a sturdier sleeping surface.

A lighter sleeper might prefer a softer, conforming option so the bed personalizes to their shape and provides them with the right amount of support.

Materials

• Innerspring

Innerspring has steel coils at the bottom of the mattress with comfort layers of foam on top. These are breathable yet heavier than other mattresses.

• Hybrid

Hybrid mattresses are combinations between different memory foams or latex with innerspring coils on the bottom. These kinds of mattresses lean more towards luxury than standard operation.

• Foam

Foam mattresses are lighter and more conforming than other mattress types, but they retain more heat. You can find all polyfoam mattresses, memory foam mattresses, and the most expensive but beneficial option, gel-infused memory foam which cools during the night.

• Latex

Finally, there are latex mattresses. These mattresses are made from high-density polyfoam and synthetic materials such as latex comfort layers. They are pricier than memory foam but retain less heat overall.

Firmness Levels

Each mattress will have a different firmness level, depending on the type of material that has been used inside of the mattress.

• Plush Soft

Plush soft is level one. This is the lightest level you will get. The surface of the mattress will sink very deep and it conforms intensely and quickly.

• Soft

Soft is quite like plush soft, known as level two or three. This level still sinks and conforms, but at a slower pace and not to such an extreme extent.

• Medium Soft

Medium soft is a level four, where any sinking and conforming happens close to the skin, while the rest of the mattress stays in shape. This is a better option if motion isolation is something high on your list of priorities.

• Medium

Level five is medium, in which sinking doesn’t occur much at all. There is conformation, but not enough to be noticed too much when asleep.

• Medium Firm

Level 6 is where firmness starts coming into play. Sinking doesn’t happen quite as much as it used to and your sleeping surface stays relatively flat. While there is confirmation, it’s not immediately noticeable and happens after much time of lying down.

• Firm

In a firm, which is known as a level seven or eight, your sleeping surface is flat with minimal sinking and conform is almost at the point of minimal.

• Hard Firm

Finally, there are the final levels of nine and ten. The mattress is so firm, that there is no sinking, and conforming is at its most minimal. It’ll be like sleeping on a soft, flat surface that doesn’t move.

Accessories and Features to Look Out For

All mattresses have features that are worth keeping an eye out for. Listed below, are some important differentiating factors worth keeping in mind.

— Durability

The more durable the mattress, the longer it will last. This means it can handle the constant weight, movement, and daily use any average mattress would encounter. Under the assumption that you have a durable mattress, its lifespan should not be shorter than seven years.

— Motion Isolation

This is an important factor to consider when you’re sleeping with a partner. Motion transfer, if someone tosses and turns, or gets up out of bed, could wake up the other person sleeping on the bed.

To avoid this, it’s better to get a plusher and more conforming mattress that isolates individual movements.

— Pressure Relief

Pressure relief is important if you suffer from back and neck pains. The closer and more precisely your mattress conforms to your body’s shape, the better the relief. It will align your spine properly and help your entire body rest in a natural position.

The top layer is the key layer in this sense. The thicker it is, the better it will conform.

— Temperature Regulation

As mentioned before, temperature regulation will relate to whether you want to sleep warm or cool. Better temperature regulation means the bed will stay cooler during the night.

— Off-Gassing

Off-gassing is an important issue to discuss since many people do not enjoy the smell. All mattresses will have that ‘new-mattress’ smell, which has never been known for being pleasant.

Some materials, such as foam and latex, retain that smell for a longer period of time. If you don’t air it out properly, you end up with an odor coming from your mattress.

— Edge Support

The edge support is a useful feature, since it strengthens the ends of the mattress. This prevents intense sinking on the sides where you’d sit and support yourself upright.

 

You might be interested in: Best Firm King-Sized Mattress

Best King Size Mattress Reviews

1. Sweetnight 12-inch Plush Pillow Top Hybrid Mattress

SPECS:

  • Mattress Firmness: Medium-Firm
  • Mattress Thickness: 12 inches
  • Mattress Type: Hybrid Innerspring and Foam
  • Cover Material: Quilted Knit Pillow Top Cotton Rayon Cover
  • Layers: 5; Knitted cotton cover, Air-Flow High-Density Foam, Gel Memory Foam, Air-Flow High-Density Foam, Wrapped Pocketed Steel Coils

Premium Pick

To start off strong, Sweetnight provides just what it promises; countless sweet nights filled with restful sleep. This mattress has five layers all tucked neatly in 12-inches.

Firstly, there is the knitted cotton cover for a soft touch against your skin. Underneath lies the gel memory foam sandwiched between air-flow high-density foam slates, with individually wrapped coils as the final bottom layer.

This medium-firm mattress is resistant to sags and has edge support to prevent you from rolling off the sides. The rayon cotton cover is soft to the touch, keeping you cool throughout the night. The pillow-top cover is quilted for a light, breezy feel and better airflow.

The foam used is CertiPUR-US certified, free from any formaldehyde, mercury, and other heavy metals. Sweetnight also assures that they use high-quality carbon steel for their spring coils with no rust or deformation over time.

Since this mattress comes in a box, it’s recommended to give it 72 hours to expand to its full loft. It can fit in all frame types and is easy to set up.

Pros Cons
  • Resists sagging and rolling off
  • 3-zone pockets for targeted support
  • Fits in all frames
  • Cool sleep with gel and rayon cotton cover
  • Shorter lifespan

Who Should Buy This?

This mattress is the standard luxury you would expect from a king-sized mattress. With support, bounce, certifications, cooling capabilities and longevity, this mattress is an investment worth making.

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2. Novilla 10-inch Gel Memory Foam King Size Mattress

SPECS:

  • Mattress Firmness: Medium-Firm
  • Mattress Thickness: 10 inches
  • Mattress Type: All-Foam Mattress
  • Cover Material: Rayon Cotton
  • Layers: 4; Cotton Rayon & Bamboo Fabric Cover, Comfort Foam, Gel Memory Foam, High-Density Memory Foam

Best All-Foam King Mattress

The next option is from Novilla, an all-foam mattress with 4 layers of supportive memory foam. There is also a top layer of bamboo fabric which enhances the breathability of the mattress.

This mattress is suitable for any sleeping position, whether back, front, or side. The gel memory foam layer helps ensure you sleep cool, no matter what the weather outside. The memory foam offers great support targeting specific pressure points on the back, neck, and shoulders.

The middle layer works as a breathability layer so there is proper airflow throughout the night. This prevents odors from developing. The mattress is certiPUR-US certified to ensure there is no mercury, formaldehyde, or heavy metals in the foam.

It fits in all bed frame types, has a 10-year warranty and a 30-day money-back guarantee. The rayon cotton cover is also machine washable.

Pros Cons
  • All-foam mattress
  • Gel and Bamboo Fabric allow for 30% more breathability and cooling
  • Fits in all bed frames
  • Odorless with no harmful off-gassing
  • Possible clumping in the middle

Who Should Buy This?

Foam mattresses are one of the best options for support and custom comfort. They are also great for sleepers of every type, so you have the right amount of support under every part of the body.  

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3. Zinus 14-inch Gel Memory Foam Pocket Spring Hybrid Mattress

Specs:

  • Mattress Firmness: Medium Plush
  • Mattress Thickness: 14 inches
  • Mattress Type: Hybrid Mattress
  • Cover Material: Not mentioned
  • Layers: 5; 1.25 inches Comfort Foam, 2 inches Gel-Infused Memory Foam, 1.75 and 1.25 inches ViscoLatex Foam, 2 layers of 0.5 inches of High-Density Foam, 7.5 inches Encased Coiling

Value Pick

Zinus has a great hybrid bed for both average and plus-size sleepers. It keeps cool during the night, keeps you relaxed while you sleep, and is overall comfy.

The soft cotton cover helps prevent sweat and body heat from collecting inside of the mattress, so you sleep cool rather than warm. It also isolates movement on the mattress so you can’t feel when your partner moves, and vice versa.

There are five layers of filling underneath the cotton covering; the first being comfort foam. There is gel-infused memory foam to keep you cool, and then there is ViscoLatex foam to help provide mobility. There are two support layers of high-density foam and finally, there are encased coils at the bottom for motion isolation and independent support of your body.

The mattress also has edge support, so you won’t roll over while you’re asleep.

Pros Cons
  • Prevents body heat and moisture retention
  • Motion isolation
  • Edge support
  • For average weight and plus-size sleepers
  • Not ideal for side sleepers

Who Should Buy This?

This mattress provides you with all the basic requirements a king mattress should have. With reliable experience, Zinus meets all the bases when making an investment-worthy mattress.

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4. Vibe 12-inch Gel Memory Foam Mattress

SPECS:

  • Mattress Firmness: Medium-Plush
  • Mattress Thickness: 12 inches
  • Mattress Type: All- Memory Foam
  • Cover Material: Not Mentioned
  • Layers: 3; 3 inches Gel Infused Foam, 2 inches Gel-Infused Memory Foam, 7 inches Conforming High-Density Base Foam

Budget Pick

The budget pick of this list is Vibe’s 12-inch king size mattress. There are three foam layers, with the first two being gel-infused foams; one regular, and one memory foam. The final layer is 7 inches of conforming high-density base foam, with a stretch knit cover.

This mattress is responsive and supports the individual pressure points on your back, neck, and shoulders. Your weight is evenly distributed over the surface. The mattress also supports any sleep position, whether back, front, or side.

The memory foam used is hypoallergenic, so it’s naturally dust mite, mold, and bacteria resistant. The foam is CertiPUR-US certified in durability and quality.

There is low motion transfer since the memory foam conforms to your shape. This mattress also comes with a waterproof mattress pad within the primary purchase.

Pros Cons
  • Hypoallergenic memory foam interior
  • Premium waterproof mattress pad inclusive
  • Reduce and targets pressure points and relieves tension
  • Mattress is considerably hard

Who Should Buy This?

This king-sized mattress is the ideal choice for shoppers who can’t afford to cut out quality but can’t afford the higher price tags. At a budgeted price, you miss out on nothing while not paying the inflated prices.

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5. Classic Brands Cool Gel 1.0 Ultimate Gel Memory Foam 14-inch Mattress with BONUS 2-Pillows

SPECS:

  • Mattress Firmness: Medium Plush
  • Mattress Thickness: 14 inches
  • Mattress Type: All-Memory Foam Mattress
  • Cover Material: Cotton Quilted Stretch Knit
  • Layers:  3; Cool Gel Memory Foam, Comfort Foam, High-Density Base Foam

Best Mattress and Pillow Package

The final option on the list is a combo purchase. Not only will you get a proper king-sized mattress, but you’ll also have two shredded memory foam pillows to go with it. There are three layers inside of the mattress, all made from memory foam to help create a strong, supportive sleeping surface.

The cover is a stretch knit fabric that goes down the top and sides of the mattress. This creates better breathability and helps cool down the mattress. The gel memory foam is used to help drive heat away from the top of the mattress. The foam is ventilated to allow warm air to exit. There is also regular memory foam to conform and support your body’s personal shape and weight.

Being memory foam, the mattress is naturally hypoallergenic. The foam is also CertiPUR-US certified in performance, emissions, and durability.

There is low motion transfer on the mattress and there is edge support in case you get too close to the ends.

Pros Cons
  • Edge support and motion isolation
  • 2 inclusive pillows
  • Hypoallergenic material
  • Strong chemical smell, airing out required

Who Should Buy This?

This deal is a great option for someone investing in their first bed, as it comes with the mattress as well as pillows. It gives you a good reference to what you need out of your mattress as well as your pillows.

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Conclusion

The right mattress can not only help your sleep better but help your overall health for the long haul. Hopefully, you have found all of the features and qualities you need from your mattress.

If you found this article helpful, then feel free to leave a comment on your experience and share this article if you know someone else who’s experiencing a mattress dilemma.