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The Foundation

Price: $349 Sale Price: $314.10
10% OFF

As low as $/week

The Foundation

Price: $349 Sale Price: $314.10
10% OFF

As low as $/week
4.2 out of 5 Customer Rating
The Foundation
Price: $349 Sale Price: $314.10
In-stock, ships within 1-2 days | Free shipping & returns
Upon placing your order with In-Home Delivery, you will be contacted by our delivery partner to schedule an appointment. Deliveries are typically completed within 2-4 weeks of order placement.

We reinvented the box spring. Our foundation provides excellent support under any Casper mattress and can be assembled in minutes. The Foundation also comes with a 30-night, risk-free trial.

Add an optional metal bed frame with the Foundation and any Casper mattress to create a perfect sleep setup.

Don't Lose Sleep

Created to support your mattress, the foundation is proven to stand up to years of sleep. Set it up in minutes with easy, no-tool assembly.


74" x 37.5" x 7.5"

Twin XL

79" x 37.5" x 7.5"


74" x 52.5" x 7.5"


79" x 59.5" x 7.5"


79" x 75.5" x 7.5"

California King

71.5" x 83" x 7.5"

Solid and/or Engineered Wood Frame and Slats Woven Exterior Upholstery Non-Woven Interior and Slat Upholstery

Free shipping and free returns in the US and Canada.

Select products ineligible for free shipping where indicated. Free shipping excludes Alaska, Hawaii, Yukon Territory, the Northwest Territories and Nunavut.

We ship via UPS in the United States and Canada from warehouse partners in each country.

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.

Got questions?

Our friendly Sleep Specialists are here to help. Give us a call now or visit your local store.

The Foundation

No-tool easy assembly

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. Mattress foundations are best paired with a sturdy metal frame to ensure maximum durability and longevity.

Much like the foundation of your home, a mattress foundation provides critical support for the entire bed. To keep sagging at bay, you need a strong and leveled base for your new mattress. This is especially true for memory foam mattresses and innerspring mattresses, as they require adequate support to maintain their structure.

At Casper, our mattress foundations are designed to protect all mattresses from degradation, no matter the bed frame or material. For sleepers with no bed base or just an old box spring, it’s time for an upgrade to truly complement your mattress purchase.

Unlike old box springs and sagging foundations, a quality mattress base provides a solid surface that ensures lasting support. Your mattress will remain in peak condition for years to come, alongside many sleep-supporting benefits:

  • Improved sleep and comfort
  • No mattress sagging
  • Secured mattress placement
  • Improved airflow

Alongside Casper mattresses, our foundations are designed for long-lasting support. With our compact slatted foundation design, you won’t be bothered by gaps or sharp pressure points.

In short, one that protects your mattress and improves your sleep. Mattress bases range from metal slats to solid platforms. At Casper, we believe the best mattress foundation is our wooden slat model. The closely-spaced beams evenly level your mattress, providing structure without sacrificing comfort. This bed base is great for all types of mattresses, including memory foam, innerspring, and hybrid mattresses, and provides greater support compared to a traditional box spring or foundation.

Not quite. Both foundations and box springs provide a base support layer for any mattress type. However, box springs add a little extra give and increase breathability, while foundations are for overall support.

A box spring is any wood or metal bed frame containing coiled springs covered by cloth. This once-popular design is now mostly found on older beds.

A foundation is any non-spring bed base, from metal or wooden slats to solid platforms. Slat models, often referred to as slatted foundations, provide more air circulation and flexibility, while solid bases give the firmest support.

Both slats and solid foundations are an ideal box spring alternative for better mattress protection.

Learn more in our guide on Platform Bed vs. Box Spring.

The ideal height for a foundation is between six and twelve inches. Shorter mattresses might benefit from a taller foundation and taller mattresses from a shorter base. When it’s all evened out with a bed frame and mattress, most beds are about two feet tall, though it’s really a matter of personal preference. Our mattress base measures 7.5” high, making it compatible with most beds.


Created to support your mattress, the foundation is proven to stand up to years of sleep. Set it up in minutes with easy, no-tool assembly.


Meet the stars of sleep innovation.

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