The Foundation

The bedrock of great sleep

Our foundation provides excellent support under any Casper mattress and can be assembled in minutes.

Select a size

100 night trial free returns

We're confident you'll love your Casper, so we give you 100 nights to try it on us or we'll give you a full refund. Learn More

How it works

Measurements & Dimensions


37.5” x 74” x 7.5”

Twin XL

37.5” x 79” x 7.5”


52.5” x 74” x 7.5”


59.5” x 79” x 7.5”


75.5” x 79” x 7.5”

Cal King

71.5” x 83” x 7.5”

Country of Origin

Designed and assembled in the USA.

Construction & Materials

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


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.

Shipping Info

In the US and Canada, we ship via UPS ground from our manufacturing partners in the USA.

Shipping Costs

Free shipping and free returns in the US and Canada.


5-year limited warranty. Read More

Great sleep, made simple