The Foundation
We reinvented the box spring.
We reinvented the box spring.
Our foundation provides excellent support under any Casper mattress and can be assembled in minutes.
Strong and sturdy
Engineered with solid wood, the foundation has been rigorously tested for durability and proven to stand up to years of sleep.
Perfectly spaced slats
Older box springs’ slats tend to be too far apart, leaving room for a mattress to sag. Our foundation’s slats are 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 don’t need to use any tools.
Strong and sturdy
Engineered with solid wood, the foundation has been rigorously tested for durability and proven to stand up to years of sleep.
Perfectly spaced slats
Older box springs’ slats tend to be too far apart, leaving room for a mattress to sag. Our foundation’s slats are 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 don’t need to use any tools.
Strong and sturdy
Engineered with solid wood, the foundation has been rigorously tested for durability and proven to stand up to years of sleep.
Perfectly spaced slats
Older box springs’ slats tend to be too far apart, leaving room for a mattress to sag. Our foundation’s slats are 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 don’t need to use any tools.
No-tool easy assembly
Product specs
(W x L x D)
- Twin37.5" x 74" x 7.5"
- Twin XL37.5" x 79" x 7.5"
- Full52.5" x 74" x 7.5"
- Queen59.5" x 79" x 7.5"
- King75.5" x 79" x 7.5"
- Cal King71.5" x 83" x 7.5"
Solid and/or Engineered Wood Frame and Slats
Woven Exterior Upholstery
Non-Woven Interior and Slat Upholstery
Designed in the USA, Assembled in China.
Works with any mattress. Requires a simple metal bed frame, slatted bed frame, or a platform (if you want extra height). The foundation should not be put directly on the floor.
Free shipping and free returns in the US and Canada.
Free shipping excludes Alaska, Hawaii, Yukon Territory, Northwest Territory and Nunavut
In the US and Canada, we ship via UPS ground from Texas.
10-year limited warranty. Read More
Frequently asked questions
We don’t recommend putting the Casper foundation directly on the floor. The chambray upholstering that covers the foundation’s sides is not designed for it. Doing so can cause unsightly wear and we want your Casper bed set to stay in perfect condition — and be eligible for warranty.
A foundation ensures that mattresses sleep like they should. Some older box springs or foundations don’t provide a solid surface, causing mattresses to sag from the breaks in support. A strong and level foundation helps mattresses to perform at their peak for a decade or more, no matter what kind of bed frame they sit on.Casper foundations and mattresses are the perfect pair. We spent over a year developing the Casper foundation, so its design has the same considerations as our mattresses. It comes in the classic Casper chambray, so it goes perfectly with the rest of the Casper products.
Yes! You can use the foundation with any mattress, but of course, we recommend you use it with a Casper mattress to get the full experience. The Casper foundation is an especially durable base that was extensively tested against weight distribution and impact. For more information on product testing, our customer support team can help.
The Casper foundation works like a standard box spring — meaning you can put it on an existing bed frame or platform base. Of course, we recommend pairing your foundation with Casper’s metal bed frame that seamlessly lifts the foundation and mattress off the ground!Regardless of what you put the foundation on, it adds height and most importantly, ensures your Casper mattress has the support it needs. If you use another bed frame, just check to make sure that it's sized to hold the foundation and able to support the