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Sofa beds sneak two functions into one piece of furniture, but these designs go beyond the binary ‘convertible couch’ typology to be completely modular, comfortable for sitting up, laying back or lying down in any number of custom configurations.

This seating set from Zuiver builds on the classic fold-out footrest and flip-up backrest concepts of an easy chair, but take such loungers to new levels by expanding the entire idea horizontally into a multi-person love seat, then stretch it further to a full-length sleep-friendly sofa.

Each modular segment can be flipped in, out, up or down as desired by the people using each part of the seating space – a pair of chairs can be formed within the larger whole of the couch, or the entire system can open and accommodate a couple comfortably. Smaller versions are also interesting craft experiments, but the purpose seems less clear in a simple lounge chair variant. And at the end of the day, everything can once again be hidden away to save space in a guest bedroom or living room.

And if the dull gray does not fit your design tastes, one of their prototypes takes colors to the extreme with a rainbow assortment of shades – each one highlighting a modular segment to reinforce the functional concept of this unique furniture series.