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Starting at $595
Available in 6 sizes
Buy

The best California King size mattress on earth.

Unboxing girl on mattress

Ready for the coolest night of your life?

Our cooling, open-cell memory foam makes up the sumptuous layers of the California King. It let's excess hot air escape to keep you breezy and fresh, all night long. If you’ve never slept on a cloud before, you’re in for a treat.

Shop the Casper Mattress

Starting at $1,395

The Casper Mattress
Shop now

Who should get a Cal King Size mattress?

A Treat for the Tall

The Cal King is 84 glorious inches long - slightly longer and narrower than a standard King.

Master Bedroom Ready

The Cal King is ideal for a spacious master bedroom - think 13 by 13 feet.

Splendid for Sprawling

Looking for a daybed? The twin size mattress is perfect for lounging, chilling, and everything in between.

A Treat for the Tall

The Cal King is 84 glorious inches long - slightly longer and narrower than a standard King.

Master Bedroom Ready

The Cal King is ideal for a spacious master bedroom - think 13 by 13 feet.

Splendid for Sprawling

Looking for a daybed? The twin size mattress is perfect for lounging, chilling, and everything in between.

A Treat for the Tall

The Cal King is 84 glorious inches long - slightly longer and narrower than a standard King.

Master Bedroom Ready

The Cal King is ideal for a spacious master bedroom - think 13 by 13 feet.

Splendid for Sprawling

Looking for a daybed? The twin size mattress is perfect for lounging, chilling, and everything in between.

Premium comfort with 'just right' firmness

Premium comfort with 'just right' firmness

Multiple layers of proprietary memory foam cradle you weightlessly, relieving pressure and lulling you gently to sleep. With its premium materials and precision design, the Cal King delivers this rejuvenating support for years to come.

free shipping & returns

Free shipping & returns.* Great rest guaranteed.

Shipping and returns are always free with Casper. Just order your California King and it’ll appear at your door in a few days. If you don’t love it, let us know within 100 days and we’ll give you a full refund. (You’ll love it, though.)

How big is a Cal King size mattress?

A California King mattress is 84 inches long and 72 inches wide.

Mattress sizing chart

Twin - 38" x 75"

Often found in kid's rooms and studio apartments.

Twin XL - 38" x 80"

Often found in college dorm rooms and studio apartments

Full - 53" x 75"

Often found in guest rooms.

Queen - 60" x 80"

Often found in master bedrooms.

King - 76" x 80"

Often found in extra large master bedrooms.

California King - 72"x84"

Often found in extra large master bedrooms (10ft x 12ft)

Shop the Casper Mattress

Starting at $1,395

The Casper Mattress
Shop now

Which Casper California King Hybrid mattress is right for you?

There are two versions to choose from if you're looking for a California King. Our hybrid collection combines the pressure relief of our original foam with the added lift from resilient springs.

The Wave Hybrid

Our most advanced mattress. The Wave Hybrid has hyper-targeted support combined with active springs, allow for better airflow.

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$3,495

The Casper Hybrid

Our original favorite, upgraded. The four-layer Casper Hybrid Twin combines zoned support with active springs for the best of both worlds.

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$1,795

The Wave Hybrid

The Wave Hybrid

The Wave Hybrid combines the powers of springs, gel and foam for the supreme dream state. The five layers gives you the most support using springs for added lift, and foam and gel for Hyper-Targeted support to provide contouring spine alignment.

wave hybrid

The Casper Hybrid

The Casper Hybrid

Our award winning Casper mattress, upgraded. The Casper Hybrid combines the best of both worlds with resilient springs as the base for added lift and our proprietary foam. The "just right" feel is now even better.

Casper core hybrid mattress

Which Casper California King Foam mattress is right for you?

Our California King mattress comes in three different flavors. Whether you’re looking for a budget-friendly streamlined model or a more luxurious option with extra features, you’ll find something you love.

The Wave

Our most opulent model. The Wave has 5 layers of sumptuous proprietary foam, for astonishing comfort and targeted support.

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$2,895

Bestseller

The Casper

Our “sweet spot” option. With 4 layers of cooling memory foam and adoring fans the world over.

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$1,395

The Essential

Our budget option. The Essential is streamlined, with three layers of foam for long nights of cloud-like bliss.

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$995

The Wave

The Wave

The Wave mattress's added thickness provides targeted ergonomic support, while the breathable, open-cell foam surface provides cooling comfort throughout your sleep.

wave essential

The Casper

The Casper

Our award winning Casper mattress was engineered using feedback and data from customers like you. If sleeping on a cloud sounds good, consider this your sweet spot.

core hand

The Essential

The Essential

The Essential delivers Casper's signature "just right" feel (not too firm, not too soft) while keeping you cool and comfortable at a lower price.

essential

How Casper keeps prices low and quality high

When Casper was founded in 2014, many people were skeptical. Would consumers really buy a mattress without testing it first? Several years and numerous awards later, we have an answer: It turns out no one likes visiting stuffy mattress showrooms to make high-stakes purchases under the scrutiny of needy salespeople. (Who knew??)

Everyone loves the ease and convenience of buying online from a trusted source, and having a high-quality mattress shipped to their doorstep for free. And people keep spreading the word that our mattresses deliver unparalleled comfort and support, top-notch construction quality, and high-tech, innovative design.

But the Casper experience isn’t just about quality, trust, and transparency. Our mattresses are a mere fraction of other brands’ prices. That’s because we’ve flipped the mattress industry on its head. By eliminating showrooms and middlemen, we keep our costs low - and pass those savings on directly to you.

Think cool. (No, cooler)

Airy Linen

Propriety open-cell foam

Nothing will ruin a good night's sleep like waking up hot and sweaty. Our foams enable airflow, so you stay comfortable and breezy through the night.

StarFree Shipping Star

Relentless team of engineers

Our team of engineers and designers developed Casper mattresses with body temperature in mind, ensuring you have the most comfortable sleep possible.

A wiggly line

Goodbye heat, hello sleep.

The foam is specially designed with up to 5 layers of premium foam (on our Wave) for an outrageously comfortable sleep.

Try a Casper California King mattress risk-free for 100 nights, and see just how cool it gets.*

Try a Casper California King mattress risk-free for 100 nights, and see just how cool it gets.*

*First order only. Terms and Conditions apply.

unboxing

Real reviews of the Casper California king mattress

Bye Bye Back Pain

5 star review rating

I was skeptical at first about a bed that can be put in a box, but I decided to give it a try anyway and so glad I did!! My wife and I have been having back pains probably due to our old mattress and I noticed the difference the first night of use.

Sandra Pearson

Checkmark variant 2A "verified" checkmark
Verified Casper Owner

Lynchburg, VA

Excellent!

5 star review rating

We absolutely love our Casper king! It is incredibly supportive and soft at the same time! It's big enough that we feel like we are sleeping in separate beds. Delivery and setup were a breeze! Highly recommend to everyone to try a casper!

Bryanna Kunkel

Checkmark variant 2A "verified" checkmark
Verified Casper Owner

Port Hueneme, California

Seriously, buy this mattress.

5 star review rating

I was a little skeptical about buying a mattress without laying on it first, but I figured that I had nothing to lose with Casper's 100 night guarantee! After the first night, all of my worries about the mattress disappeared as I had the BEST SLEEP E...

Continue Reading

Scott

Checkmark variant 2A "verified" checkmark
Verified Casper Owner

London, ON
Read more reviews

Shop the Casper Mattress

Starting at $1,395

The Casper Mattress
Shop now

*Additional fees may apply for HI, AK, and certain areas of Canada. Terms & Conditions apply.

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Fast, free shipping*

Your order will ship via UPS in 2-3 business days — for free!

Once your product ships, you’ll receive a shipping confirmation email with a tracking number.

* Free shipping excludes Alaska, Hawaii, Yukon Territory, Northwest Territory and Nunavut

The Foundation

A supportive alternative to the box spring.

Our strong and level Foundation serves the same function as a box spring, but offers better support and height for your mattress. Paired with a bed frame, will help your mattress perform at its peak for a decade or more.

  • Engineered with solid wood
  • Stands up to years of use
  • Easy to assemble
  • 30 night trial and free shipping and returns
  • 5 year limited warranty
  • Requires a bed frame, and works with most standard frames

The Adjustable

Find your perfect position.

Raise your head, feet, or both to get comfortable and rest easy.

  • Wireless remote control
  • Zero-Gravity position relieves pressure on your body
  • Anti-Snore position prevents snoring
  • Saves your favorite positions
  • Split King option to control your side of the bed
Rest assured
  • Fits most slatless frames, or can be used on its own. Does not require a box spring
  • 30 night trial, free shipping and returns
  • 20 year limited warranty

The Adjustable Pro

Indulge in extreme comfort.

Customize your setup with pressure-relieving positions, time-saving presets, a pre-sleep massage that lulls you to sleep and more.

  • Zero-Gravity position relieves pressure
  • Anti-snore position prevents snoring
  • Headrest tilt function
  • Massage feature
  • Under-bed lights
  • Wall-aligning technology
  • Wireless remote control
Rest assured
  • Free in-home setup included*
  • Fits most slatless frames, or can be used on its own. Does not require a box spring
  • 30 night trial, free shipping and returns
  • 20 year limited warranty
*Availability may vary by delivery postal code

What goes under your mattress?

To make sure you get the best sleep of your life, we offer three bed frame options to cover all your bases.

The Foundation + Metal Frame

The basics for your new mattress. Foam mattresses don't sit well on old box springs, so you'll need a foundation instead. Complete your set with a metal frame if you don't have one already. Explore

The Platform & Upholstered Bed Frame

An alternative to a foundation and metal frame. You can choose between The Platform or The Upholstered bed frame for an added touch of style.

The Adjustable & Adjustable Pro Bed Frame

Skip the foundation and platform bed frame, and opt for the most customizable sleep option. With an adjustable frame, you'll get the ultimate sleep experience. Explore

Already have a frame?

If you have a frame at home, make sure you use a firm, non-spring foundation or a bed frame with slots that are less than 4 inches apart. Any other kind of box spring or bed frame won't give your foam mattress the support it needs. We also don't recommend putting your mattress directly on the floor.

Pick your perfect feel without compromising comfort or support

SOFTER

Hybrid (foam + springs)

The spring base layer in our hybrids results in a slightly softer and more responsive feel.

FIRMER

All-foam

Our all-foam options provide contouring pressure relief with a slightly firmer feel.

Unsure if you’re all-foam or more hybrid?

FOAM (UPDATED 2019)HYBRID: FOAM + SPRING
  • Thin Checkmark (Without Circle)

    High-density memory foam

  • Thin Checkmark (Without Circle)

    Transition layers for comfort

  • Thin Checkmark (Without Circle)

    Open-cell foams sleep cool

  • Thin Checkmark (Without Circle)

    High-density memory foam

  • Thin Checkmark (Without Circle)

    Transition layers for comfort

  • Thin Checkmark (Without Circle)

    Open-cell foams sleep cool

  • Thin Checkmark (Without Circle)

    Springs provide added lift

  • Thin Checkmark (Without Circle)

    Individual coils for increased airflow

  • Thin Checkmark (Without Circle)

    Firmer perimeter for edge support

What you need to know about Hybrids

Added support

An added layer of resilient springs provides extra support for back, belly, and side sleepers of all sizes.

Extra lift and bounce

Hundreds of individual springs make Hybrids more responsive. Your body will feel elevated and afloat, rather than sinking in.

Added airflow

Each coil lets body heat circulate out to keep you cool through the night.

More durable

Say goodbye to sagging. The added layer of sturdy springs extends the lifespan of your mattress for many years to come.

What you need to know about Hybrids

Added support

An added layer of resilient springs provides extra support for back, belly, and side sleepers of all sizes.

Extra lift and bounce

Hundreds of individual springs make Hybrids more responsive. Your body will feel elevated and afloat, rather than sinking in.

Added airflow

Each coil lets body heat circulate out to keep you cool through the night.

More durable

Say goodbye to sagging. The added layer of sturdy springs extends the lifespan of your mattress for many years to come.

Upholstered Bed Frame

We’ve found your soft spot.

  • Made of sturdy wood and steel
  • Wrapped in three custom woven textiles
  • Features a 2-inch perimeter
  • Easy one-tool assembly
  • No box spring or foundation required
  • 30 night trial, free shipping and returns
  • 5 year limited warranty

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* In-home setup excludes Alaska and Hawaii