The Up 2000 series is a collection of seating designed by Gaetano Pesce for B&B Italia. UP 4 is a round-shaped sofa constructed from flexible cold-pressed Bayfit foam and comes fully upholstered in a choice of fabrics. The base is upholstered in 100% jute fabric.

The seating in the series becomes, thanks to its shapes, artistic elements to the interior. UP 4 can be combined with several models from the same series. Thanks to the UP 5_6 armchair, the Up 2000 series has achieved iconic status and is still as interesting today as when it was first introduced in the late 1960s.