Many of today's daybeds employ a linkspring as the support system for the mattress. The linkspring is a rectangular metal frame (roughly the footprint of the mattress) with cross supports. A wire or polyester / nylon mesh held in place by a network of springs lies across the top of the linkspring. The linkspring design provides support and creates clearance underneath a daybed for storage.
There are two categories of modern daybeds, indoor and outdoor. Daybeds can be hanging or stable, outdoor day beds usually have a roof like structure to protect from sunlight whereas indoor daybeds are simple.
Infant beds can be converted into a daybed by the removal of one side.