The Foundation

  • Select a size
  • Twin
    $225
  • Twin XL
    $225
  • Full
    $225
  • Queen
    $250
  • KingReady to ship
    $350
  • CAL King
    $350
The Casper Foundation
Corner detail of the Casper Foundation
Top view of the Casper Foundation
Detail view of the Casper Foundation

The bedrock of great sleep

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

Select a size

  • Twin$225
  • Twin XL$225
  • Full$225
  • Queen$250
  • King$350
  • CAL King$350
Crescent moon with one starA crescent moon flanked by one star.

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

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How it works

Strong and sturdy

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

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

Effortless assembly

It can be easily assembled and disassembled in a matter of minutes — and you don’t need to use any tools.

Measurements & Dimensions

Twin

37.5” x 74” x 7.5”

Twin XL

37.5” x 79” x 7.5”

Full

52.5” x 74” x 7.5”

Queen

59.5” x 79” x 7.5”

King

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

Compatibility

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.

Warranty

5-year limited warranty. Read More

Great sleep, made simple

Risk-free trial

Risk-free trial

We’re confident you’ll love your Casper, so we give you 100 nights to try it on us or we’ll pick it up and give you a full refund.

Free shipping & returns

Free shipping & returns

Free shipping is included with every order. Returns are free, too. And we do our best to donate every returned mattress to a local charity.

Exceptional customer service

Exceptional customer service

We’ve got more than 40 snooze specialists available seven days a week to answer every question under the moon.