A foundation ensures that mattresses sleep as they should. Some older box springs or foundations don't provide a solid surface, causing mattresses to be affected by the breaks in support. A strong and level foundation helps mattresses to perform at their peak for a decade or more, no matter what 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 and is designed to have the right support for all of our mattresses.