Perron Pillo 4-Seater Sofa is a modular sofa designed by designer Willo Perron for Knoll. Resembling a free-standing stack of oversized cushions, the 4-seater sofa is designed to offer highly comfortable support to sit, curl up and stretch out in. Creating an inviting sofa was an important part of the designer's design strategy. The modular sofa challenges all preconceived notions about design and is created with humor and arouses both surprise and emotion. The sofa comes with a steel frame, fabric upholstery and is filled with molded foam. The 4-seater sofa comes with comfortable top cushions that are attached with D-rings and a clamping system at the bottom of each seat holds the modules securely together. This sofa consists of four different modules - a right module, two middle modules and a left module.