Traditionally, a box spring was necessary to support your mattress in a wooden or metal bed frame ... be expanded to a king or reduced down to a twin bed from the full/queen configuration.

Hence the modern iteration of the box spring: the mattress foundation. Generally made with wood or metal, these foundations are framelike with support slats across the top where the mattress rests ...

It comes in sizes twin to queen. A box spring is not required ... gray-toned wood, and a natural wood. A box spring is not required for this bed frame. It has seven inches of clearance underneath ...

Regardless of whether you’re building a frame for a tiny twin bed or oversize ... friction can cause the wooden frame to rub right through the fabric on the box spring and mattress.