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Casper

Casper Sleep Foundation for King Mattress

  • Based on 1,074 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Aug 17 – Aug 18
Order within 5 hours and 12 minutes
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Size: King


Style: Foundation


Features

  • Woven Exterior Upholstery
  • STRONG AND STURDY: Engineered with solid wood, the foundation has been rigorously tested for durability and proven to stand up to years of sleep
  • SUPPORTIVE SLATS: Perfectly spaced slats positioned a perfect four inches apart for optimal support
  • EFFORTLESS ASSEMBLY: It can be easily assembled and disassembled in a matter of minutes and you dont need to use any tools
  • COMPATIBLE WITH YOUR KING BED: The foundation is 7.5" tall and works with standard bed frames, metal bed frames, slatted bed frames, or platforms.
  • COMFORT YOU CAN COUNT ON: For over 11 years, Casper has helped more than 4.5 million people get better sleep for less

Description

Our foundation provides excellent support under any Casper mattress and can be assembled in minutes -- no tools required. It can also be quickly disassembled if you are moving or need to maneuver around tight corners. Older box Springs’ slats tend to be too far apart, leaving room for a mattresses. Our foundation’s slats are positioned a perfect four inches apart for optimal support. Engineered with solid wood, it has been rigorously tested for durability and proven to stand up to years of sleep.

Size: King


Material: Wood


Product Dimensions: 79"L x 75.5"W x 7.5"H


Style: Foundation


Special Feature: Care Instructions Spot clean the fabric with a mild detergent and let air dry before you continue using. See more


Other Special Features of the Product: Care Instructions Spot clean the fabric with a mild detergent and let air dry before you continue using.


Included Components: 2X - Center Support Beam, 2X - End Rail, 2X - Foundation Support Slats / Box Spring Support Slats, 2X - Side Rail, 4X - Corner Pin


Brand Name: Casper


Unit Count: 1 Count


Manufacturer: Casper Sleep


UPC: 192472004805


Global Trade Identification Number: 05


Manufacturer Warranty Description: 2-year limited warranty.


Item Type Name: Box Spring Foundation


Model Number: FN00000064


Manufacturer Part Number: FN00000064


Material Type: Wood


Assembly Instructions Description: Included


Style Name: Foundation


Color: Grey


Finish Types: Painted


Furniture Finish: Gray


Form Factor: Rectangular, King Size


Shape: Rectangular


Compatible With Mattress Size: King


Maximum Weight Recommendation: 750 pounds


Size: King


Item Dimensions L x W x H: 79"L x 75.5"W x 7.5"H


Item Weight: 88 pounds


Ground To Item Distance: 7.5 inches


Item Depth: 7.5 inches


Item Dimensions: 79 x 75.5 x 7.5 inches


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 17 – Aug 18

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Great for foam mattress
Size: King Style: Foundation Pattern Name: Box Spring
Easy to assemble and sturdy
Reviewed in the United States on March 12, 2025 by fred
    • This is the one to buy!
Size: California King Style: Foundation Pattern Name: Box Spring
If you are looking for a box foundation, this is the one to get! We searched and searched and read tons of reviews on all different types of box springs. After reading so many, we landed on this from Casper. We had purchased a memory foam mattress, and realized it needed just a bit more support than the mattress alone. The biggest difference between this box spring and the others is the material. We had read some reviews about metal box springs, and heard that they eventually would squeak. That is a dealbreaker for us. Casper foundation is made of a sturdy material and comes with the Casper reputation. It was incredibly simple to put together. Just like any square item, you will want to ensure that they are lined up well prior to inserting the pegs. No tools were required. However, we did use a hammer for ease of positioning. It wasn’t necessary though. The difference with this boxspring underneath the mattress is night and day. It was well worth the additional price, and just like purchasing my mattress, the money was well spent. ... show more
Reviewed in the United States on December 29, 2022 by Annie Townsend
    • Well Designed, Sturdy, Easy to Assemble
Size: Full Style: Foundation Pattern Name: Box Spring
I've ordered 3 of these for different locations over the past 3 years. They are very study and easy to put together. Very clever design. Attractive fabric wrap.
Reviewed in the United States on August 18, 2024 by Dawn O then A
    • Part missing
Size: Full Style: Foundation Pattern Name: Box Spring
Review Image by DD DD
I purchased this in the past and loved it. This was easy to put together, a hammer is all you need really. I was able to put it together by myself. It looks good and is very sturdy. Will be easy to take apart and move as well. Would definitely recommend. However, this time there was hardware missing off of the middle support bean that allows it to slide into the frame. I would like a replacement piece. ... show more
Reviewed in the United States on July 7, 2021 by DD DD
    • Great purchase
Size: Queen Style: Foundation Pattern Name: Box Spring
I don't often write reviews but this product is worth it! It is perfect. I purchased a headboard/footboard with side rails from an up scale consignment store. Then purchased a memory foam mattress (Amerisleep, made in USA, excellent!). But the bed was not designed for the weight of a memory foam mattress. I added slats with legs but it didn't raise the mattress up enough. Did my research and found standard box springs can't be used with memory foam. And then I found the Casper box spring specifically designed to solve my problem All the reviews were positive, so I ordered it. It was the easiest thing ever to put together (I'm 68 and didn't need any help!) and it fits perfectly. My new mattress feels even better too! This is very good quality and I highly recommend it if you have an older model bed and want to buy a memory foam mattress! ... show more
Reviewed in the United States on June 9, 2021 by lpa
    • Boy! That was easy!
Size: Queen Style: Foundation Pattern Name: Box Spring
A couple of years back, I purchased a twin Zinus "Smart Box Spring" which was basically a grown up lego set and took me at least 1 hour to assemble and then get into the cover. So when I purchased this set, I had prepared myself for the same ordeal. This couldn't have been easier to assemble. There were 2 short pieces that were held together by 2 "pegs" and 2 long pieces held together in the same way. All pieces were clearly marked "Up!" so you could easily figure out how to get the pieces to line up and insert said pegs. It was together in less than 10 minutes! The slats sit on top and hopefully will hold -- I haven't had a chance to try them out yet. W My only "ding" was when we were unboxing the Casper Mattress, we had to be careful to keep the slats from "bunching up" underneath... but that wasn't a huge issue. While Zinus was much cheaper, I was extremely relieved to have this be such an easy assembly and wanted a foundation that I figured was engineered specifically for my mattress. [LCVR] ... show more
Reviewed in the United States on July 4, 2020 by Amazon_Customer
    • Solid and Quiiiet
Size: Queen Style: Foundation Pattern Name: Box Spring
This is a solid box spring foundation and has a classy look almost a gray tweed type material, ive matched mine with quiet balance frame and a dream cloud 14in mattress all compliment each other perfectly i also added a headboard and it's all perfection but back to the box spring very sturdy and the assembly was so easy it shipped quickly and the sale price was an instant draw . It's quality , it's a good use of your money you won't feel taken. I'd highly recommend this one. ... show more
Reviewed in the United States on August 27, 2022 by Elizabeth L.
    • Perfect!!!!
Size: Queen Style: Foundation Pattern Name: Box Spring
This foundation was definitely the perfect choice. Very simple to assemble, and the price was affordable. My daughter’s old bed foundation was making her mattress very uncomfortable. Every time she laid on her bed you could hear the old bed foundation make very loud noises. Replacing it was a must, because it was making her life miserable. This Casper foundation was the best choice, her sleep has improved ten fold. No noise, and she tells me that her mattress feels more comfortable. ... show more
Reviewed in the United States on September 11, 2022 by Jennifer Thompkins

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