Sleep Foundation for Twin XL Mattress

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.