Sleep Box Spring Foundation for Twin XL Mattress

2026-04-10T00:21:31-05:00

Price: 333.22

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 don’t need to use any tools

COMPATIBLE WITH YOUR TWIN XL 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

The Casper Foundation is designed to provide excellent support under any mattress. It ships in a compact box and can be easily assembled in minutes — without any tools! Unlike traditional box springs, our foundation can be broken down quickly if you’re moving or need to maneuver around tight corners. 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. Our foundation’s slats are positioned a perfect four inches apart for optimal 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. Our Casper Foundation is with all Casper Mattresses, but works seamlessly with any brands’ product.