Sofa Bed:

--A sofa bed is a type of sofa that can be converted into a bed by unfolding or extending a hidden mattress within the frame of the sofa.

--The mattress of a sofa bed is typically larger and thicker compared to futons, providing better comfort for sleeping.

--Sofa beds often come with a pull-out mechanism or a fold-down backrest to transform the sofa into a bed.

--They tend to have a more traditional sofa appearance and are available in various styles and designs to match different room décors.

Sleeper Sofa:

--The terms "sleeper sofa" and "sofa bed" are often used interchangeably, but some people use the term "sleeper sofa" to refer to more high-end or luxurious sofa beds.

--Sleeper sofas may have additional features and higher-quality mattresses, making them more comfortable for both sitting and sleeping. Some deep seated sleeper sofa with chaises offer extra comfort and style to the living room and family room.

--They are often found in upscale furniture stores and may offer a wider range of customization options in terms of design, upholstery, and mattress types.

Futon:

--A futon is a sofa or couch that can be converted into a bed by folding down the backrest, creating a flat, continuous sleeping surface.

--Futon mattresses are usually thinner compared to sofa beds, and they may be filled with materials like cotton, foam, or a combination of both.

--Futons have a more casual and simplistic appearance compared to traditional sofa beds, and they are often used in minimalist or modern settings.

--Futons are typically more affordable than sofa beds or sleeper sofas, making them a popular choice for budget-conscious shoppers.