Modular seating system including 4 different units suitable to different combinations and personalization: sofa, single seating, angular seating with backrest and pouf. The frame is made of a rod steel tube with Ø 16 mm, the shell is completely upholstered with a fire-retardant injected polyurethane foam that makes it soft and unshrinkable. Fabric or simil leather upholstery covering.