A daybed is an item of furniture used as a bed as well as for lounging, reclining, and seating in a common room. It may be considered a form of multifunctional furniture. Their frames can be made out of wood, metal, or a combination of wood and metal. They are a cross between a chaise longue, a couch, and a bed. Daybeds typically feature a back and sides and may, for example, come in twin size (100 cm × 190 cm; 39 in × 75 in). Daybeds often feature a trundle to expand sleeping capacity.

Modern daybeds

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 them from sunlight, whereas indoor daybeds are simple. An infant bed can be converted into a daybed by removing one side.