Finding the best king mattress for side sleepers is not a “one size fits all” endeavor, and personal preferences often lead side sleepers to prefer certain types of mattresses. The good news is that many mattress manufacturers today understand that it’s difficult to choose a mattress without getting to sleep on it, and lengthy at-home trials have become standard.

Let’s take a more in-depth look at the types of mattresses that are good for side sleepers and the characteristics that make those mattresses exceptionally comfortable. You’ll also find our top recommended king-size mattresses for side sleepers who prefer the added space.

What Makes a Mattress Good for Side Sleepers?

Side sleeping is the most popular sleep position, according to WebMD, with women being twice as likely to sleep on their sides as men. Keeping this in mind, it’s no surprise that so many people are interested in finding the best king mattress for side sleepers, and here are a few factors you’ll want to consider.

Weight Considerations

First, the sleeper’s weight has a considerable impact on the pressure your body will feel on the mattress. Sleepers under 130 pounds may find a softer mattress more comfortable, while those who weigh over 230 pounds might want to find something firmer.

If you and your partner are on opposite ends of the spectrum in terms of weight, you may need to test out a few different options until you find one you both find comfortable.

Pressure Points

Side sleepers experience more pressure on their shoulders and hips while they sleep, but they also require more spine support that other sleeping positions. The best way to alleviate the pressure while also supporting the spine is to choose a slightly less firm mattress that allows the cushioning to fill in and keep the spine in proper alignment.

Firmness

Most side sleepers prefer a soft or medium-firm mattress with a rating between three and seven, with the best results somewhere around a level five. Side sleepers can also make the most of many mattresses with zoned comfort designs, but it’s good to plan on testing out any mattress you buy for several nights to several weeks to ensure it’s comfortable.

Types of Mattresses

Just because you sleep on your side doesn’t mean you have a limited number of mattress types that will allow you to sleep comfortably. Memory foam, innerspring, and hybrid mattresses are widely available in different firmnesses and price points, so you can find a comfortable option that fits any budget.

Memory Foam

Memory foam mattresses keep your partner’s movement from transferring to your side of the bed, and they’re excellent for contouring around the body, which makes them ideal for side sleepers. Memory foam features a design intended to conform to your body shape instead of compressing, so you feel supported and there’s less pressure on your shoulders and hips.

Memory foam mattresses come in a wide variety of firmnesses, and it’s possible to get softer ones that are more comfortable for side sleeping. This material is also a good option for those who like to be warm when they sleep or for couples of very different weights.

Innerspring

Innerspring mattresses are the most popular design available today, and they use a series of interlocked coils for a springy feeling mattress that offers adequate support. This design is one of the oldest technologies in the mattress industry and provides the broadest range of comfort and budget options to best suit your needs.

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These mattresses come in a wide range of prices and firmness levels, making them ideal for relieving pressure at the shoulder or hip. If you are looking for a very soft mattress, this design likely isn’t for you. Likewise, if you want a mattress with excellent motion isolation, it’s best to get a hybrid mattress or try out foam mattresses instead.

Hybrid

A hybrid mattress combines the best characteristics of an innerspring mattress with the added comfort of memory foam to provide an excellent level of contouring and support to side sleepers.

Suppose you are looking for a softer mattress. In that case, a hybrid mattress comes in a variety of firmnesses and price points, so it’s easier for couples to compromise without sacrificing too much comfort. The drawback here is that these mattresses are typically more expensive, but other designs unmatch the enhanced support.

Finding the best king mattress for side sleepers helps ensure you get a restful night’s sleep and a high-quality mattress that will serve you well for several years. Below are our recommended mattresses that provide ample support and high-quality construction that will last.

Saatva Classic Mattress

The Saatva Classic Mattress features handcraft construction and comes in soft, medium, or firm, so you can choose what works best for your body. Inside, you’ll find individually wrapped coils and what they call “spinal zone technology” that uses a euro-style pillow top layer underneath their organic cotton cover that helps ensure you stay cool while you sleep.

The mattress cover is also treated with Guardin® botanical antimicrobial fabric treatment to deter bacterial growth without the use of harmful chemicals. The most popular option for side sleepers is the “luxury firm” level 5-7, which provides ample support to your spine while also offering softness in the right areas such as your shoulders and hips.

Pros:

  • Comes in a variety of sizes and firmness levels
  • Uses durable tempered steel springs that are individually wrapped
  • Breathable and treated with an antimicrobial fabric treatment
  • Excellent edge support with the Dual Perimeter edge support system

Cons:

  • Pricing does not include necessary boxed spring

The Nectar Memory Foam Mattress

The Nectar mattress features premium quality memory foam designed to hug the curves of your body but also keeps you cool, thanks to the Quilted Cooling Tencel mattress cover. Unlike other mattresses, this one comes with a Forever Warranty, and you get to test it out at home for 365 nights with free shipping and returns.

What makes this mattress ideal for side sleepers is the five layers of premium quality materials that help ensure the mattress breathes. The gel memory foam layer reduces undue pressure on certain parts of your body. The 11″ height allows you the most comfort but still works with conventional bedsheets.

This mattress also offers superior motion isolation thanks to the Adaptive Response Transition Layer of foam that prevents users from feeling like they’re sinking into the bed too far.

Pros:

  • No box spring required; you can even put this mattress on the floor
  • Meets CertiPUR-US requirements for emissions, content, and durability
  • Supportive base layer stabilizes the upper layers for a more supportive feel
  • Built-in bottom mattress cover prevents slipping on surfaces

Cons:

  • Needs time to expand once removed from the packaging fully

Loom & Leaf Mattress

The Loom & Leaf mattress features a quilted top with an organic cotton cover for added comfort. This memory foam mattress features several different layers, including a gel cooling layer to prevent sleepers from overheating and premium quality memory foam for the best contouring and support while you sleep.

The foam used for this mattress meets the CertiPUR-US standards and is free from harmful chemicals. There is also a high-density foam base and added transition layers that give this mattress a feeling of support balanced with stability so you can sleep on your side comfortably without excess pressure on your shoulders and hips.

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One of the key characteristics that make this mattress attractive to side sleepers is the multi-zoned gel layer that is denser in the center third to better support the spine but creates necessary softness at the hip and shoulder.

Pros:

  • Organic cotton cover
  • 5lb. Memory foam and multiple layers of high-density foam
  • Concentrated support in the lumbar area
  • 180-night at-home trial period

Cons:

  • Only two comfort levels: relaxed firm and firm
  • Required boxed spring costs extra

Puffy Lux Mattress

The Puffy Lux mattress provides comfort for all sleeper types thanks to their unique construction that provides ample support without firmness that creates painful pressure. The Dual Cloud foam and Firm Core Support Layer work together to keep your spine aligned and eliminate common pressure points, making it ideal for side sleepers.

This mattress comes with a hypoallergenic and stain-resistant cover that is Oeko-Tex® Standard 100 Certified to keep your mattress in near perfect condition. The removable cover zips away easily for cleaning and resists water and dust mites to protect your mattress best.

The Puffy Lux mattress is an excellent option for side sleepers in particular because it comes in two options: memory foam and a hybrid that mixes memory foam and internal coils so you can select the type of support that works best for your body.

Pros:

  • 101-Night at-home trial period
  • Lifetime Warranty
  • 100% of the mattress gets manufactured in the USA
  • Works on any surface (no box spring required)

Cons:

  • Sleepers may sink into the mattress, reducing their mobility
  • Expensive compared to other boxed mattress options

The DreamCloud Luxury Hybrid Mattress

The DreamCloud Luxury Hybrid mattress uses a unique combination of individually wrapped coils and luxurious foam layers to create a thick and cozy mattress with just the right amount of contour for side sleepers.

This mattress’s top layer is quilted and constructed with foam and cashmere to keep sleepers cool, while the gel memory foam layer below offers the best contouring and cooling. Together the upper layers keep you cool as you sleep and help isolate any movement from your partner.

Added layers of foam ensure that you get just the right amount of that “sinking” feeling to feel supported, and the individually wrapped coils adapt to the curves of your body to eliminate pressure points. This mattress measures 14″ high and is rated “Luxury Firm,” which makes it a good option for side sleepers that need a bit more support.

Pros:

  • 365-day home trial
  • 14″ height using multiple layers of premium materials
  • Lifetime Warranty
  • Targeted support layers fitting for all kinds of sleepers

Cons:

  • Heavy and difficult to move
  • Not the best motion isolation, even on larger sizes

Leesa Hybrid Mattress

The Leesa Hybrid mattress features an award-winning design that offers sleepers the best in pocket spring mattress construction and premium foam materials. The topmost layer of foam has holes punched through it to increase breathability and cooling so you can still enjoy the cozy feeling and support of memory foam without overheating.

This mattress has over 1000 active response style pocket springs, so it’s very durable and a stable option for all kinds of sleepers. The cover features the signature grey stripes, quilting and is seamless and ultra-breathable.

The multiple layers of foam in this design not only contain the pocket springs for added motion isolation, but they add contouring, which is ideal for side sleepers.

The Leesa Hybrid mattress is also CertiPUR-US certified, which means it gets made without formaldehyde, PBDE flame retardants, ozone depleters, heavy metals, and phthalates. The Leesa is also manufactured and designed in the USA and has low VOCs, so there’s less off-gassing to deal with when it arrives.

Pros:

  • A 10-year warranty and a 100-night risk-free trial
  • Edge to edge support
  • Designed to relieve pressure and provide support for all sleep positions
  • Medium-firm with a pleasant bounce

Cons:

  • Heavy (King size weighs 142 pounds)

GhostBed Luxe Mattress

The GhostBed Luxe mattress offers numerous layers of material designed to cool and support your body as you sleep. This design ensures the best level of contouring and support for side sleepers thanks to the blend of gel memory foam and other high-density foams that transfer excess heat away from the body and relieve pressure from the shoulders and hips.

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The GhostBed Luxe boasts 2-Stage Cooling Technology that starts with their plush cooling Ghost Ice Fabric that is supple and soft. Cooling fibers woven into the cover create advanced airflow and beneath that is 1″ of memory foam that provides a cozy feel without being overwhelming.

This mattress also uses patent-pending Ghost Ice Layer foam that is thermo-sensitive and Ghost Memory Foam for the type of sensitive support that side sleepers need. The Ghost Bounce Layer is exclusive to GhostBed and contours around the body but has latex responsiveness for a unique springy feeling.

Pros:

  • A 25-year warranty and 101-night sleep trial
  • 7.5″ core for the best in durability
  • Medium-plush firmness
  • Comes with a luxurious cooling cover

Cons:

  • Edges need more edge support

Nolah Original 10″

The Nolah Original 10″ mattress uses temperature neutral AirFoam™ that moves heat away from your body faster than standard foam but doesn’t allow you to feel like you’ve “sunk in.” This memory foam also does an excellent job of relieving pressure from areas like the shoulders and hips, which makes it an ideal choice for side sleepers who want to maintain mobility.

The Nolah is a bit softer than some other mattresses, but the high-resilience foam is much more durable than standard memory foam. Hence, it’s less likely to soften up significantly over time. This feature is excellent news for side sleepers that often have to “break-in” a new mattress.

This mattress also comes with a white Tencel cellulosic cover with a botanic origin, which makes it more sustainable. The Nolah Original 10″ is also CertiPUR-US certified and free from viscoelastic chemicals.

Pros:

  • Lifetime Warranty and a 120-night trial
  • 100% Made in the USA
  • Works with a wide variety of bases, even without a box spring
  • Medium-firm

Cons:

  • A bit on the soft side, even for some side-sleepers

Frequently Asked Questions

Finding the right mattress can be tricky, so here are some answers to frequently asked questions that buyers have as they navigate their way through the buying process.

Are Mattresses Delivered in a Box Good Quality Compared to the Mattresses that Ship Flat?

Mattresses that come in a box can be very high-quality and comparable to the type of mattresses that ship flat. To get those mattresses into a shipping box often requires heavy equipment that compresses the mattress tightly to roll up and fit into the much smaller packaging, but this doesn’t damage the mattress itself.

Can I Sleep on My Boxed Foam Mattress the Same Day I Receive it?

This type of mattress frequently requires at least 24 hours to expand fully, and there may be some slight off-gassing during this process. When you open the package, the mattress may have a faint odor, but most buyers find that any scent dissipates quickly.

You can still sleep on the mattress the same day that you receive it, but don’t make any judgments about the comfort until it’s had a chance to reach its full size and shape.

What Type of Mattress Allows For the Most Mobility While I Sleep?

An innerspring mattress will support your spine without allowing you to feel like you’ve “sunken” into the mattress. You can always add a mattress topper for added softness, which is a thin layer of foam that provides added comfort and contouring around the shoulder and hip area.

Final Thoughts

Side sleepers can find an excellent quality mattress that they find comfortable regardless of the internal construction. While some buyers swear by innerspring mattresses for the softest density, many individuals choose memory foam for its contouring qualities and general cozy feel overall.

Regardless of what design you choose, plan to test it out for at least several nights to truly get a feel for it and determine if you sleep more comfortably.

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