California King Size Mattress

There is no one “best mattress” for everyone, as sleeping position, body type, health concerns, and comfort preferences impact what a person needs from a mattress.

The best California king size mattresses offer enough support to maintain neutral spine alignment, but are malleable enough to fit to your curves and ease pressure points. The mattress should also have the durability to last several years.

Weigh the advantages and disadvantages of each type before you choose a new mattress.

Mattress Type	Pros	Cons	Good for
Memory Foam	Pressure-relieving Conformability Quiet Excellent motion isolation Hypoallergenic	May trap body heat A sleeper may feel "stuck" Off-gassing	Side sleepers Back sleepers Stomach sleepers Combo sleepers
Latex	Responsive Contouring Aerated for breathability Isolates motion Hypoallergenic	Heavy Firmer feel than many sleepers expect Expensive	Side sleepers Back sleepers Stomach sleepers Combo sleepers
Innerspring	Bouncy Cooling Edge support	Little to no pressure relief Motion transfer Noisy coils Prone to sagging Allergens and dust mites may accumulate	Back sleepers Stomach sleepers
Hybrid	Bouncy Breathable Pocketed coils isolate motion Foam layers block out allergens	Noisy coils Coils transfer more motion with age May sag within a few years Expensive	Side sleepers Back sleepers Stomach sleepers Combo sleepers

Memory Foam
Memory foam mattresses grew popular through the bed in a box movement because they can easily fit in a small box for home delivery. Shipping directly to the customer also lets online brands sell mattresses at a reduced price, as the company doesn’t have to pay for the costs of a storefront.

Memory foam mattresses contain at least two foam layers—on top is a memory foam layer, and underneath is a base layer of supportive, stiff foam. Higher quality mattresses add a transition layer to prevent sinking through the comfort layer and hitting the support layer.

Sleepers with allergies may want to try a memory foam mattress, as the material’s density prevents allergens and dust mites from accumulating inside the mattress.

Traditional memory foam’s density can trap body heat, as air cannot easily flow through and carry off the excess heat. If too much heat collects in the mattress, it can disturb your rest. Some companies add cooling gels to create a gel memory foam mattress that wicks away body heat, while others infuse the foam with different conductive materials (copper, graphite, charcoal).

Latex
Latex and memory foam have similar contouring abilities—however, latex is a firmer, bouncier material than memory foam.

The most durable kind of latex is natural latex. To produce natural latex, manufacturers extract rubber tree sap and process it with the Dunlop or Talalay methods. Dunlop is dense and firm, while Talalay is soft and springy.

Natural latex mattresses can be expensive, thanks to the costs of harvesting and processing the sap. It can be challenging to find a latex mattress as well, as most of them are restricted to online stores. Some owners find it worthwhile to track a good latex mattress down, as the best latex beds can last between 10 to 20 years.

Innerspring
While not as popular as they once were, many people still enjoy the feel of an innerspring mattress. Its bouncy coils keep you lifted and make the mattress more breathable.

Many sleepers, however, find an innerspring mattress lacks pressure relief—the thin comfort layer just can’t mold itself fully to a sleeper’s body, and the areas it leaves unsupported cause pressure to build up. If you have a chronic pain issue such as back pain or hip, you may want to consider a more conforming mattress.

Hybrid
Manufacturers blend elements of an innerspring and foam mattress to create a hybrid mattress. The mattress has a coil support layer and 2 to 3 inches of foam—usually memory foam, but sometimes latex or poly-foam.

The coil core keeps the mattress cool by providing better air circulation than a dense support foam could offer, while the top layer of foam features more pressure relief than an innerspring mattress. A hybrid’s coils are usually wrapped in foam or fabric for better motion isolation.

Yes. Aside from a California king size mattress, there’s the standard king size mattress and split versions of each (for couples with different firmness preferences). You might also see a California king size mattress referred to as a “Western king” and a standard king called an “Eastern king.”

California King
72 inches by 84 inches

Standard King
76 inches by 80 inches

Split California King
Two mattresses, each 36 inches by 84 inches

Split King
Two mattresses, each 38 inches by 80 inches

When shopping for a mattress, look for:

• High-quality materials: High-density foams withstand extensive use best as the material is tightly packed together. Thicker coils maintain support longer than thinner coils.
• A suitable firmness:Your sleeping position affects what firmness option is best for you. Side sleepers should consider a mattress with a soft to medium feel. Back sleepers should look for mattresses with a medium-firm to firm feel. Stomach sleepers need a firm mattress to prevent spinal misalignment.
• Hypoallergenic properties: A dense top layer, such as memory foam or latex, prevents allergens and dust mites from settling in a mattress.
• Cooling technology:If your mattress absorbs too much body heat, you might wake up sweaty in the middle of the night. Cooling gels, other conductive materials (copper, graphite, charcoal), and added air channels can improve heat dispersion.
• Motion Isoloation:If you share a bed with a restless sleeper, a mattress that isolates motion can prevent sleep interruptions. Memory foam is the best type of mattress to prevent motion transfer; conversely, an innerspring’s bounce can have you feeling your partner’s every movement.
• A long sleep trial and warranty:Many sleep trials last for around 100 days, and the industry standard for a mattress warranty is 10 years.
• A reasonable price:Most mattresses stores mark up a mattress’s price to meet storefront and staffing costs—if you want a good deal on a quality mattress, look online. Internet companies cut out the middleman and offer lower prices.

It’s a good idea to leave 30 inches of walking space around your mattress. We recommend a bedroom at least 11 feet by 10 feet, though you might need more space for bedroom furniture.

We cannot recommend using a box spring with our mattress or any other kind of memory foam mattress, as the box spring’s construction simply can’t offer the consistent support a foam bed needs. The springs inside are spaced far enough apart that the parts of the memory foam mattress sink into the gaps, stretching the bed out of shape and causing premature sagging.

Instead, we recommend a slatted bed frame or a solid foundation. Of the two, slats promote more airflow to cool down a mattress—a solid surface prevents air from moving through the bottom of a bed.

If you use a slatted foundation, make sure the slats are spaced no more than 3 inches apart and are at least 0.5 of an inch thick. Any slats thinner or further apart won’t offer the even support the mattress needs.

No, as the reduced width and added length keeps standard king size fitted sheets from slipping over a California king size mattress. King size blankets and comforters can be used on a California king size mattress, although they may hang slightly over the sides.

An extensive sleep trial protects you from settling for a mattress that doesn’t feel right for you. If you find your mattress is still uncomfortable after the typical 30-day adjustment period, you can return your mattress.

If you’re past the sleep trial period and you need to change your mattress’s feel, try a mattress topper. A topper adds a few extra inches of soft or firm foam—and some toppers include gel foam for added coolness.

A memory foam mattress becoming softer or firmer can be a sign that the material is wearing out—a topper can still help you stretch out the use of your bed until you want to replace it.

Memory foam mattresses such as the Zoma mattress typically need replacing up to every 10 years, as the mattress materials lose support and become less comfortable. That is why we offer a 10-year warranty to ensure your mattress will last for a decade.

You may have to replace your mattress earlier than expected, however, if you don’t take care of it. If your mattress is not kept on a sturdy foundation and regularly cleaned and rotated, it may wear out sooner.

Each Zoma mattress is made to order here in the United States. We use CertiPUR-US® certified foams in all of our mattresses for consumers’ safety.

A California king is 72 inches wide and 84 inches long. Cal king mattresses are slightly narrower than standard kings, but they are four inches longer, so they are a favorite for tall people.

Most California king mattresses run between $1,000 and $2,000 on average. California kings are a little bit harder to find, so finding a good deal can be a little more tedious, but not impossible.

The difference is the width and length. A common misconception is that Cal king mattresses are bigger than standard kings, but they are actually only longer than kings. They’re a good option for people who want the surface area of a king but their living space is narrower.