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With mattresses, sometimes bigger is better. King size mattresses — including variants like California king — are the largest standard sizes on the market. They offer plenty of room for couples, taller sleepers, families, pet owners, and even just people who like to sprawl in bed. However, with a wide range of material choices, price-points, and luxury features to choose from, finding the best king size mattress can be a struggle. To help our readers achieve a good night’s sleep, we’ve put together a list of our favorite king size mattresses on the market.
Almost every major mattress brand is available in a king size option, meaning that customers have a wide range to choose from. Choosing a type of mattress — such as hybrid, memory foam, innerspring, or latex — is the most crucial step, as a mattress’s materials and build make the most significant difference to their overall feel.
Hop down to our Buyer’s Guide for a crash course on finding the best mattress for you.
For our Editor’s Pick, we chose the Brooklyn Bedding Signature mattress. We’ve put the Signature through rigorous testing, and it emerged as one of the top-rated mattresses on Tuck, with high-quality hybrid construction at an affordable price-point.
Beneath a quilted polyfoam cover, the Signature’s comfort system is constructed from two 2-inch layers of cooling gel-infused polyfoam, and the support core features 6 inches of pocketed coils and 1 inch of high-density polyfoam.
Though this construction remains consistent, the Signature’s feel varies significantly depending on its firmness level. For customers who choose the right option for their weight and sleep preferences, this customization allows for an ideal blend of pressure relief and support. The soft option, for example, offers a plush, deeply contouring mattress for lightweight sleepers, while the medium and firm firmness levels balance this against — or partially exchange it for —significantly firmer support with minimal sinkage.
Premium materials and top-of-the-line construction allowed the Signature to shine in our testing process, and it earned four stars in all but one of our sleep categories. Couples will particularly appreciate the mattress’s above-average motion isolation, edge support, and suitability for sex, but the Signature is an appealing choice for almost all customers in search of the best king size bed.
With three firmness options and top-of-the-line hybrid construction, the Brooklyn Bedding Signature mattress offers customized support for a wide variety of sleepers. The Signature is one of the top-rated mattresses on Tuck, with an affordable price-point which also makes it one of the best deals available on a king size bed.
Hybrid mattresses are a popular choice, and the best combine the benefits of both all-foam and innerspring beds. The Casper Hybrid offers customers the excellent pressure relief and motion isolation of memory foam, paired with supportive coils which also allow for surprisingly good airflow and temperature neutrality.
The secret to the Casper Hybrid’s responsive pressure relief lies in its three inches of comfort layering. The first 1.5-inch layer is standard polyfoam, a less-conforming material with a much bouncier feel than memory foam. The second 1.5-inch layer is low-to-medium density memory foam, which compresses easily and without bounce but also provides highly-conforming pressure relief. These layers work together to give sleepers a mattress which minimizes pressure points while retaining some responsive bounciness.
In addition to the comfort layering, the Casper Hybrid has a 1.5-inch polyfoam transitional layer, as well as a support core of 6-inch pocketed coils and their 1.5-inch base of high-density polyfoam.
Due to its single firmness rating of medium, or 5.5 out of 10, the Casper Hybrid is more suitable for lightweight and average weight sleepers. Our testers who weigh above 230 pounds, as well as our average weight stomach-sleeping testers, reported that it was too soft for ideal support.
The Casper Hybrid is an excellent choice for customers looking for a mattress that balances the pressure relief of memory foam with the support of pocketed coils. For sleepers under 230 pounds, its careful design provides a bed with both proper support and plush pressure relief.
Although memory foam mattresses offer many benefits — a lower average cost, as well as improved pressure relief, noise, and motion isolation — they also have downsides, such as shorter lifespans and worse temperature neutrality. Our choice for the best king size memory foam mattress, however, provides sleepers with all the upsides of memory foam, while minimizing the drawbacks.
A breathable cover, made from Tencel and cotton, allows for cooling airflow. The 4-inch-thick comfort system consists of a 1-inch layer of quilted gel memory foam, as well as a 3-inch layer of gel memory foam. Gel-infused foam is designed to provide more airflow than traditional memory foam. Although both layers are low-to-medium-density, they allow for a mattress which balances luxurious pressure relief with low sinkage and good support.
Following a transitional layer of high-density memory foam, the Nectar has a 5.25-inch support core of high-density polyfoam. While these don’t offer the same durability or edge support as some hybrid, innerspring, or latex mattresses, our testing found that the Nectar performed better in these areas than many of its memory foam competitors.
Where the Nectar really shines is in offering superb pressure relief, motion isolation, and support to a surprisingly wide range of sleepers. Despite only having one firmness level, the Nectar received high grades from sleep-testers of many different weight ranges and position preferences.
The Nectar offers broad appeal and minimal drawbacks while still providing sleepers with excellent pressure relief and motion isolation. With luxury touches and a surprisingly low price given the quality of its construction, the Nectar is an ideal choice for customers looking for a king size memory foam mattress.
In many ways, latex is a natural alternative to memory foam. Sourced from rubber trees, latex offers pressure relief with a bouncy resilience, as compared to memory foam’s signature contouring. Natural latex also sleeps cooler, and is significantly more durable than synthetic foams. The Zenhaven makes the most of these characteristics and offers sleepers — particularly back sleepers and average weight sleepers — one of the best latex mattresses on the market.
The Zenhaven was designed to be eco-friendly, beginning with its organic cotton cover. As a flippable mattress, its comfort system consists of two 1.5-inch layers of aerated Talalay latex, with one on each side. The firm side uses medium-soft latex, while the medium-soft side uses similarly softer latex.
To ensure sleepers receive the ideal support for each area of their body, each side is divided into five zones with pincore hole patterns to ergonomically alter the density. Finally, the support core consists of 6 inches of Talalay latex.
During our testing process, the Zenhaven performed very well in all but a few of our sleep categories. It also received high marks from our sleep-testers, receiving nothing lower than three stars, though back-sleepers were among the most impressed.
The eco-friendly Zenhaven shows off latex’s best side, with cool and responsive pressure relief and ergonomically zoned support. Although the Zenhaven is best suited to side-sleeping or average weight customers, its flippable firmness options and balanced comfort still make it appealing to a wide range of sleepers.
With luxury touches at an affordable price, the Saatva — which offers four king size variants to choose from, in addition to three firmness options and two thicknesses — is our choice for the coolest king size bed on the market. Traditional innersprings like the Saatva allow for the most airflow, keeping even the warmest sleeper cooler than the other mattresses on our list.
Although the Saatva may not be as all-natural as the Zenhaven (also manufactured by Saatva), it does use sustainable manufacturing where possible. This begins with the cover, which is made of ultra-soft organic cotton and includes a flame retardant barrier made using thistle pulp. All thickness and firmness options include a dacron-fiber pillow-top for a supportive plush surface, as well as a 1-inch polyfoam comfort layer which improves pressure relief.
Beneath the comfort layers is the first of the Saatva’s two coil layers: four inches of medium-gauge pocketed coils for a balanced feel. Following this is four or seven inches of recycled steel Bonnell coils (depending on the mattress thickness chosen), for a coil-on-coil design which offers better support and pressure relief than traditional innersprings.
Due to having three separate areas to customize, as well as offering targeted support with its coil-on-coil construction, the Saatva is likely to appeal to a wide range of sleepers.
Innerspring mattresses sleep cooler than most other mattress types, but the Saatva’s charms extend beyond its superior temperature neutrality. Features like eco-conscious construction, customizable options, and luxury touches are matched by an affordable price, making the Saatva a great deal with broad appeal.
In the guide below, we’ll share everything you need to consider when buying a king size mattress, including pros and cons, king size variants, and the most common mattress material types.
Introduced in the 1940s, king size mattresses are the largest standard size beds on the market. While variants are available, standard North American king size beds are 76 inches wide by 80 inches long. This works out to 6.3 feet wide by 6.6 feet long, which is the same length as a queen bed but significantly wider.
Couples, parents, and pet owners often gravitate towards this size and its variants, as the extra space means there’s plenty of room for two or more sleepers. Interior design fans and those in search of a luxurious touch also tend to appreciate the king size for its aesthetically pleasing shape and opulent look.
However, if your heart is set on one of the more obscure variants (such as Alaska king), you might struggle to find it. King size beds also have a price tag to match their size, and can be heavy enough to make moving or repositioning them difficult.
Preferences vary, but generally people under 130 pounds like softer beds, while those above 230 pounds find firm beds more comfortable, and those in the middle prefer softer or firmer beds depending on their sleep position. This is because sleep position preference also plays a major role in choosing the right mattress.
For example, side-sleepers usually require good pressure relief, as they have a tendency to develop pressure points at their hip and shoulder. Personal taste also plays a part, with the question of whether someone likes to feel as though they are sleeping ‘in’ or ‘on’ a mattress being left up to preference.
When purchasing a bed frame or bedding for your king size bed, it’s critical to make sure you have the right size. Variants like split and California king mattresses are a different shape than ordinary kings, and some mattresses are thicker than others.
While king is the original, there are also many king size variants. These range from the very common to the very uncommon, which may limit your choice of mattresses if you decide on a rare variant.
As the largest mattresses on the market, some king size beds also come with an equally large price tag. To help our readers find the best king size mattress for them at a price they can afford, here are our three favorite tips for finding a budget bed: