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The Essential MattressSupport, breathability, and bounce in a two-layer build.
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The Casper King Size Mattress

Price: £700

Price: £700

The Casper King Size Mattress

Our king size mattress is designed by our sleep experts & engineers. After over 100 prototypes and dozens of rounds of feedback, the Casper is designed to perfection giving you the comfort and support you need for the best night's sleep.

  • A wiggly lineZoned support for spinal alignment
  • A wiggly line100 nights risk free home trial
  • A wiggly lineA 2019 WHICH best buy
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*delivery in 2-3 days

king size mattress

Award-winning comfort

Good Housekeeping

9.8 out of 10 from the Good Housekeeping Institute

Which?

2019 WHICH? Best Buy Winner

The Independent

Voted #1 mattress by the Independent

Engineering the perfect mattress

The Casper mattress is not your average foam mattress. Originally designed by our sleep experts and engineers in Silicon Valley, the universal Casper comfort principles have since been tailored to British sleep needs. Oh, and it's manufactured in the U.K.

Superior support

Our engineers did their research to create a mattress designed for British people's needs. Our 4 unique layers of foam provide instant pressure relief and a perfect balance of softness and support.

All season breathability

Memory foam has been known to cause overheating - but not the Casper mattress. We have added a open-cell top layer foam to allow for air to circulate and you to sleep cool.

Contour cuts

The contour cuts in our foams are a defining feature of the mattress. They allow your hips and shoulders to sink in meaning your spine is straight for a better night's sleep without aches and pains.

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Quick & convenient delivery

Free shipping

Free shipping and returns are included with every order.

Award-winning customer service

Our Snooze Specialists are on hand to answer every question under the moon. Give us a call or send us an email.

Old mattress removal

Less time getting rid of your old mattress, means more time in your new one. Let us do the heavy lifting for you with our mattress removal service.

Free shipping

Free shipping and returns are included with every order.

Award-winning customer service

Our Snooze Specialists are on hand to answer every question under the moon. Give us a call or send us an email.

Old mattress removal

Less time getting rid of your old mattress, means more time in your new one. Let us do the heavy lifting for you with our mattress removal service.

Free shipping

Free shipping and returns are included with every order.

Award-winning customer service

Our Snooze Specialists are on hand to answer every question under the moon. Give us a call or send us an email.

Old mattress removal

Less time getting rid of your old mattress, means more time in your new one. Let us do the heavy lifting for you with our mattress removal service.

For your best night's sleep

Try the Casper Try the Casper
Try the Casper

For your best night's sleep

Try the Casper Try the Casper
Try the Casper

King size mattress overview

Our king size mattress: configuration

Let’s face it: most of the jargon you come across when choosing a new mattress doesn’t actually help you make a decision, instead it causes extra confusion. The good news is that the Casper mattress doesn’t need you to choose between half a dozen zone layouts and firmness levels. We have done all the hard work for you - creating a mattress with a unique combination of high-quality foam layers. The result? A bed that is soft enough to cradle you like a baby and firm enough to support you perfectly throughout the night:

  • Open-cell foam: Provides comfort and reliable breathability
  • Memory foam: Adapts to the shape of your body and relieves your shoulders and hips.
  • Transition foam: Firm yet soft, this layer acts as a transition to the firm base foam.
  • Support foam: Thick layer that supports your weight and keeps the mattress in shape.

    The Casper’s layout works for the vast majority of sleepers, regardless of their preferred sleeping position or body size - all you have to choose is the size that fits your bed. Not sure which size is for you? Feel free to call us or send us an e-mail and we’ll help you choose.

    Give it a try – thanks to our 100 nights free trial period if, for any reason, your don’t love your mattress you can return it and get your money back. On top of your 100 days trial, you get a 10-year warranty on your mattress.

What makes the Casper mattress unbeatable

The Casper king size mattress is the right size for solitary sleepers who like to stretch, as well as couples who enjoy sleeping on the same mattress but don’t want to get in each other’s way.

Aside from its size, the Casper mattress also satisfies all other expectations you might have of a high-quality mattress.

What the Casper mattress does
Supports All Sleeping positions
The mattress fits you perfectly, no matter if you sleep on your side, stomach or back.

Supports Different Body sizes
You can choose between various sizes to fit your body size.

Supports Breathability
Our mattress is made from breathable materials, preventing heat and stale air from building up.

It's Robust
The mattress cover is easy to take off and clean in your washing machine.

Suitable for People with Allergies
We use high-quality materials suitable for allergy sufferers according to the OEKO-TEX Standard 100.

Together, these properties mean the Casper mattress fits almost any type of sleeper, is easy to clean and provides the most comfortable sleep possible.

Unbeatable on price
We'll even offer you an exclusive Casper discount.

You won't lose sleep over ordering and delivery

When you get your new mattress in the mail, you won’t believe your eyes: a king size mattress in a how-did-they-do-it-size box? Don’t worry, that’s just for convenience. Simply take your new mattress out of the box, let it expand and you’ll soon find that appearances can be deceptive.

We offer free shipping and returns, and you can pay a tiny bit extra for planned delivery (choose a date and get a 2 hour slot). Additionally, we can take away your old mattress for you.

Our king size mattress is all about giving you the space you need at night and it’s available in two size variants:

  • King: 150 x 200 x 24 cm, 33 kg
  • EU King: 160 x 200 x 24 cm, 35 kg

    This allows your new mattress to fit the most popular bed frames perfectly. If you’re looking for even more room, why not consider our extra-large super king size mattress? It’s a whopping 180 cm wide to give you and your special someone even more space. Order now and you’ll be able to enjoy the most comfortable mattress on the market within 1-3 days delivery time.

    If you're interested in other mattress sizes, we have these too:
  • Single mattress
  • Small double mattress
  • Double mattress
  • EU double mattress
  • Super king size mattress

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Delivery Options That Suits You

Choose a specific delivery date with in-home set up (£20), or even have your old mattress taken away (additional £15). Learn more.

Choose a specific date for your delivery. We’ll even text you the day before with a 2-hour time slot so that there is no need to wait in longer than necessary.

Can’t wait to jump in? Our in-home setup partners will unbox your new bed and take away any packaging.

Don’t fancy a trip to the dump? We’ll help you spend more time in your new bed by getting rid of the old one.

Please note: Scheduled delivery only available for mattress orders. If buying accessories please place a separate order.

Check if this service is available in your area

Whiteglove IconA hand catching some ZZZs

Fast, free shipping

Your order will be delivered in 1-3 business days - for free! Once your product is on the road, you will receive a confirmation e-mail with your tracking number.

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