A daybed is an item of furniture used as a bed as well as for lounging, reclining, and seating in a common room.
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.