The Casper King Mattress

Perfect for couples, parents who share the bed with small children, and individuals who require extra space, the Casper King Mattress is 76” wide and 80” long. Given its sizeable dimensions, it fits best in a spacious master bedroom. The Casper’s award-winning sleep surface provides contouring support and keeps you cool through the night.
  • 76” X 80” X 10”
  • Ships by May 31
$1,150

100 night trial, Free Return Pickup

Sleep on it, lounge on it, dream on it — if you don’t love our king mattress, we’ll pick it up and give you a full refund. No springs attached.

THE PERFECT MATTRESS FOR EVERYONE

The Casper’s sleep surface is universally comfortable — it contours to your body to relieve pressure while retaining a healthy bounce and cool temperature. Sure there are lots of options out there, but we’ve cut through the confusion to offer a single, perfect choice.
SEE THE DESIGN STORY

COUNTRY OF ORIGIN

Designed and assembled in the USA.

CONSTRUCTION & MATERIALS

  • 4-Layer Foam Construction
  • High Elasticity Comfort Foam
  • Visco Elastic Memory Foam
  • Proprietary Transition Foam
  • Polyurethane Support Foam
  • Polyester/Polypropylene Zipper Cover

MEASUREMENTS & DIMENSIONS

Size Guide
  • Twin
    39” x 75” x 10”
    55 lbs
  • Twin XL
    39” x 80” x 10”
    57 lbs
  • Full
    54” x 75” x 10”
    72 lbs
  • Queen
    60” x 80” x 10”
    83 lbs
  • King
    76” x 80” x 10”
    103 lbs
  • CAL King
    72” x 84” x 10”
    104 lbs

SHIPPING INFO

In the US, we ship via UPS Ground. In Canada, we ship Purolator Ground from our Canadian warehouse partners. Please allow one extra day for customs. In parts of New York City, Los Angeles, and San Francisco, we offer same-day White Glove delivery. All mattresses come shipped in a 19” X 19” X 42” box.

SHIPPING COSTS

Free shipping and free returns in the US and Canada.

CERTIFICATION

All the foams in the Casper mattress have environmental certifications that ensure they are safe and non-toxic. All of our foams are CertiPUR certified.

CertiPUR-US® approved foams are made without ozone depleters, PBDE flame retardants, mercury, lead and other heavy metals, formaldehyde, phthalates regulated by the Consumer Product Safety Commission. They are Low VOC (Volatile Organic Compound) emissions for indoor air quality (less than 0.5 parts per million).

WARRANTY

10-year limited warranty. Read More

JUST THE RIGHT SINK,
JUST THE RIGHT BOUNCE

Engineered for everything you might do in bed, the Casper’s award-winning sleep surface combines supportive memory foam and a springy comfort layer. It offers just the right amount of sink and bounce for deep sleep and indoor sports.

KEEPS YOU COOL

Our top comfort layer features a breathable, open-cell design to increase circulation and keep you cool. Air can pass freely beneath your body, even when the material contours to your curves.

DESIGNED TO REST ON ANY FIRM, FLAT SURFACE

(ESPECIALLY THE CASPER FOUNDATION)

CASPER KING MATTRESS REVIEWS

4.4/5
Too firm
Denise Kruzil
Verified Casper Owner
Naperville , Illinois
55 years old
May 16, 2017
Too firm

The delivery and set up was good. We upgraded to a king sized mattress which is great. The mattress itself is too firm for my taste. Maybe a topper would help.

7
hours of sleep per night
Sleeps with a partner plus a cat
Awesome Customer Service, Great Bed
Brian
Verified Casper Owner
Richboro, Pennsylvania
May 11, 2017
Awesome Customer Service, Great Bed

We got the king size Casper mattress after reading a lot of reviews about it. We had a relatively new bed that was very comfortable (plush) but wanted to use it for a guest room. Consumer reports rated this bed very highly (also for tall people) My wife really likes soft beds like plush or pillow top but we both were interested in giving it a shot. We are both tall and thin. When I sleep on firm mattresses my arms are always falling asleep so I was a bit hesitant to try this mattress but the 100 day return policy made me more confident. My arms have not fallen asleep on the Casper. The bed arrived in a box! It was heavy, but manageable to carry up stairs with a second person. Customer service is top notch. I had an issue putting together the foundation. I called around 8 PM on a weeknight and spoke with rep within 3 min who remedied situation very quickly. This to me is a sign of a good company that actually cares about its customers. The bed: it's comfortable. It feels much firmer than our plush bed when you sit on it but it's oddly soft when you lay on it. We have been using it for 2 weeks. I'm sold. It's not a life changer but it's a comfortable bed and we sleep well on it.

7
hours of sleep per night
Sleeps with a partner
Extremely happy
Adam
Verified Casper Owner
Lancaster, New York
30 years old
May 11, 2017
Extremely happy

Was in a pinch to purchase a mattress, and had seen Casper pop up from time to time. Ordered a king with foundation, both were delivered extremely fast to my house. Had it unboxed and set up in 10 min. One of the rare instances "buying blind" exceeded expectations. Going to buy another for the guest room.

7
hours of sleep per night
Sleeps solo
We are sleeping well every night on this mattress.
Sandy
Verified Casper Owner
Berea, Ohio
May 11, 2017
We are sleeping well every night on this mattress.

The unboxing was fun, and impressive. I couldn’t believe a king mattress was contained in that box.

7
hours of sleep per night
Sleeps with a partner
Second Casper Mattress
Bryan
Verified Casper Owner
Floral Park, New York
May 10, 2017
Second Casper Mattress

I ordered my first Casper Mattress for more than a year ago and love every second on it. We moved into a house and we wanted to get a new mattress for our spare room. We noticed that the prices to the Casper mattress went up. We originally got a king and the new one is a queen and the price is the same as when we got the king. We took this into consideration and then said, why go for a cheaper brand when we know the sleeping on this mattress is amazing? So we bought it and our guests love it as much as we do. Thank you for making an excellent product.

7
hours of sleep per night
Sleeps with a partner
The above rating is combined. I like it, but spouse is not sure yet. See review below.
Dennis & Eva Skulborstad
Verified Casper Owner
Geneva, Illinois
65 years old
May 10, 2017
The above rating is combined. I like it, but spouse is not sure yet. See review below.

Unboxing and setting up fairly straight forward. Realize we are individually testing a full size, which was purchased for a guest room, testing for considering a king for our bedroom. I have slept in it for about two weeks and like it. I sleep on my side and feel supported along the spine and hips. In addition, it sleeps cool. However, my wife is still unsure. She is currently sleeping on it for several weeks and does not like what she calls the wrap around effect. In addition, she always ends up sleeping on the edge and does feels the support declines. Currently, we're inclined to return it under the 100 day trial period.

8
hours of sleep per night
Sleeps solo
Great sleeping
Denise
Verified Casper Owner
Naperville, Illinois
May 10, 2017
Great sleeping

Changing over to a king sized bed from a queen was a great decision. I wish the mattress was softer, like the pillow topped we replaced. My husband likes the firmness but it's not my preference.

Sleeps with a partner plus a cat
Love it
Vincent
Verified Casper Owner
Stamford, Connecticut
May 10, 2017
Love it

I bought these beds because they came in a box to the door. After moving back from overseas, I was totally lost looking for a new bed and mattress. With three kids under 4 years of age home with me, going to a mattress place was out of the question (if you're a parent, you get it). My mom told me my brother got a new mattress that he loved and it was delivered to his door folded up. I messaged him and he said he loved it. I went online and purchased a king and extra long twin to put side by side for our big co-sleeping family. I chatted with a staff member to get it delivered the day before we moved in. It was THAT simple. Do I love it? Yes I do. It's amazing. In fact, I no longer want to share. I'll be purchasing two more twins for the kids so I can have my Casper all to myself. If you're on the fence, get off. This was the best decision for our family - and the box spring took 5 minutes to put together. Love love love.

6
hours of sleep per night
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Great Product and Service
Bobby
Verified Casper Owner
Vestavia, Alabama
May 10, 2017
Great Product and Service

I ordered a replacement king mattress, foundation, mattress protector and pillows several weeks ago. The mattress arrived the next day and the foundation the following day. The foundation really was easy to put together. I think I have slept better since getting the Casper then I have in a long time. My Fitbit sleep tracking confirms that I am sleeping better.

6
hours of sleep per night
Sleeps solo
Sleeping like an angel
Erica
Verified Casper Owner
Redondo Beach, California
May 10, 2017
Sleeping like an angel

Love the mattress! We got the king because we needed more space for us and our dog. My first thought was that the mattress was on the firm side but I am sleeping like an angel and rarely waking up in the middle of the night like I used to with my old mattress. I'd recommend this mattress to any friends or family.

7
hours of sleep per night
Sleeps with a partner plus a dog
Not too hard, not to soft.
Chris n Dawn Cerino
Verified Casper Owner
Redfield, New York
47 years old
May 10, 2017
Not too hard, not to soft.

It was easy to assemble. I also can't feel my husband rolling around. I highly recommend the king size.

8
hours of sleep per night
Sleeps with a partner
Not too firm not too soft
John
Verified Casper Owner
Detroit, Michigan
May 10, 2017
Not too firm not too soft

It was a perfect fit! First king size bed also and it's awesome! My girlfriend and I can hardly find each other on it. Heaven

7
hours of sleep per night
Not too firm not too soft
John
Verified Casper Owner
Detroit, Michigan
May 10, 2017
Not too firm not too soft

It was a perfect fit! First king size bed also and it's awesome! My girlfriend and I can hardly find each other on it. Heaven

7
hours of sleep per night
Super, but a little warm
Gretchen
Verified Casper Owner
Troy, Michigan
May 08, 2017
Super, but a little warm

The unboxing of a king size mattress went ok with 2 people - that's really not a one person job. But we love our new Casper mattress. The only little problem I'm having is that when I have a hot flash/night sweat, this mattress does seem to retain the heat. Otherwise, it's really comfy!!

6
hours of sleep per night
Sleeps with a partner plus a cat
Great
Cindy Nichols
Verified Casper Owner
Deputy, Indiana
47 years old
Apr 26, 2017
Great

I had back surgery 10 years ago. Since then I have not slept more than a couple hours a night. I tossed and turned and could not get comfortable. We purchased a twin sized Casper Mattress as a trial to see if it improved my symptoms. It is fantastic. I sleep a straight 5-6 hours now without moving, which I have not done in years. We will be purchasing a king size for the master bed as soon as possible. In the mean time the five year old and I will keep arguing over who gets to sleep in his bed! I am a healthcare provider and will recommend Casper to my patients with chronic pain problems.

5
hours of sleep per night
Sleeps with multiple partners
Great mattress!
Karen Hempfling
Verified Casper Owner
Johns Island, South Carolina
53 years old
Apr 11, 2017
Great mattress!

We've been using the Casper mattress for a little over a month now. To begin, customer service was great when I ordered. We were closing on a house and wanted to be able to sleep on the new mattresses our first night, but were concerned that they would arrive days early and end up sitting on the front porch with no one to pick them up until we had the keys to the house. Customer support assured me that they could ship them out and place them on a hold with UPS, for delivery on the requested day. As promised, our mattresses arrived on closing day! We purchased 2 twin XL mattresses because we have a king sized bed, equipped with two separate adjustable bed bases from Tempurpedic. Having separate mattresses allows us to adjust each side of the bed independently of the other side. Our previous mattress was a very expensive Tempurpedic mattress and I hated it. It was extremely hot and felt like I was sleeping on concrete. A couple of hours into the night, I would wake up with aching hips and knees. I am so happy with the Casper mattress. It stays cool and I no longer wake up with achy joints. This is a great mattress for women who experience hot flashes at night. I've been sleeping great on this mattress and my husband has as well. Our dog likes it too, but then she is pretty happy to just sleep anywhere. I would absolutely recommend a Casper mattress to my friends and family.

6
hours of sleep per night
Sleeps with a partner plus a dog
So completely impressed and pleased
Maia
Verified Casper Owner
Ottawa
47 years old
Mar 31, 2017
So completely impressed and pleased

Our new king Casper mattress arrived in 2 business days (Canada) and unboxing/setting it up was actually fun, which with a king size bed, we have never said before. We purchased the Casper for a murphy-bed thinking we'd try it out on guests before committing to it for our own master bed. Our first guest raved about the great sleep he had, so we tried it and have been sleeping on it since (4 weeks). We have abandoned our own bed, a traditional spring mattress with pillow top, half a dozen years old having cost a few thousand dollars and with permanent human shaped divots from where we sleep. We have been so disappointed by that mattress and didn't want another spring/pillow top mattress (ever). We did a lot of research this time into different types of mattresses and manufacturers, asked friends for recommendations, purchased a latex mattress only to return it because latex alone proved to be too firm and memory foam alone too warm. We are throughly pleased with the comfort of this mattress (good support but with 'give' and no heat transfer), the ordering process, affordability and customer service, and as soon as we finish our home renovations we will be buying another for our own bedroom so we can sleep as comfortably as our guests.

7
hours of sleep per night
Sleeps with a partner plus a cat
IT IS AN OVEN!!!
Fred Bertsch
Verified Casper Owner
Denver, Colorado
43 years old
Mar 30, 2017
IT IS AN OVEN!!!

I am so very sad to write this review...I believed the Casper hype and went all in! I bought sheets, pillows, and a king mattress. Wife and I got the mattress at the beginning of the winter and it was pretty good. Seasons have started to change, and now we are both sweating right through the sheets every night. Our options are to wake up to a freezing cold home and sleep well, or sweat right through our sheets and be miserable. I am terrified of this summer as I live in a mountain climate and folks do not have AC here. Oh...overheating was never a thing for us with any of our old beds; this is a 100% new phenomenon that only started with Casper. Packaging shipping etc...first bed smelled of glue so bad we returned the first mattress...second one came...great it opened easy etc...we are now sleeping in our guest room incredibly upset with our purchase. End of day Casper has made me sleep worse than i ever have

6
hours of sleep per night
Sleeps with a partner
Cant wait to get in bed
Sonya Komarinski
Verified Casper Owner
York, South Carolina
46 years old
Mar 21, 2017
Cant wait to get in bed

We ordered the king size mattress, box spring and frame. Absolutely love it. My favorite part is that I don't feel my boyfriend moving around all night.

7
hours of sleep per night
Sleeps with a partner
So much better than my previous mattress
Linda Hoffman
Verified Casper Owner
Philadelphia, Pennsylvania
67 years old
Mar 17, 2017
So much better than my previous mattress

I would definitely recommended Casper. The king size was heavier than I realized and was a bit of a problem for us to get upstairs. Once set up, however, I was happy with the choice. Motion transfer is not non-existent, but is greatly improved from my previous mattress. We have it on box springs, so I will try a bunkie board to see if that helps. The firmness is perfect for sleeping. And the temperature is good also. The only thing I don't like is sitting on the edge, too soft.

7
hours of sleep per night
Sleeps with a partner plus a cat

HOW WE DESIGNED THE PERFECT MATTRESS

SEE THE PROCESS