Daybeds are used as bed

Bed

A bed is a large piece of furniture used as a place to sleep, relax, or engage in sexual relations.Most modern beds consist of a mattress on a bed frame, with the mattress resting either on a solid base, often wooden slats, or a sprung base...

s as well as seating. They can be made out of wood

Wood

Wood is a hard, fibrous tissue found in many trees. It has been used for hundreds of thousands of years for both fuel and as a construction material. It is an organic material, a natural composite of cellulose fibers embedded in a matrix of lignin which resists compression...

, metal

Metal

A metal , is an element, compound, or alloy that is a good conductor of both electricity and heat. Metals are usually malleable and shiny, that is they reflect most of incident light...

 or a combination of wood and metal.

A cross between chaise longue, couch

Couch

A couch, also called a sofa, is an item of furniture designed to seat more than one person, and providing support for the back and arms. Typically, it will have an armrest on either side. In homes couches are normally found in the family room, living room, den or the lounge...

 and a bed

Bed

A bed is a large piece of furniture used as a place to sleep, relax, or engage in sexual relations.Most modern beds consist of a mattress on a bed frame, with the mattress resting either on a solid base, often wooden slats, or a sprung base...

.

Daybeds typically feature a back and sides and come in Twin Size

Bed size

Bed size refers to the dimensions of a mattress and the names by which standard sizes are called. Beds themselves vary widely in size according to the degree of ornamentation but are sold according to the size of mattress they take...

 (39 in × 75 in = 99 cm × 191 cm). Often daybeds will also feature a trundle

Trundle bed

Trundle beds are usually considered a pair of beds, one a twin bed, and the other slightly smaller on rollers or casters so that it may be put beneath the upper twin bed for storage...

 to expand sleeping capacity.

Many of today's daybeds employ a linkspring as the support mechanism for a 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

Spring (device)

A spring is an elastic object used to store mechanical energy. Springs are usually made out of spring steel. Small springs can be wound from pre-hardened stock, while larger ones are made from annealed steel and hardened after fabrication...

lays across the top of the linkspring. The linkspring design provides support and creates clearance underneath a daybed for storage.