They can be essential and classic in their elegance, or more informal and transformable. Monochromatic and sophisticated or multi-colored and defiant. Made with different materials, in terms of the structures and the cushions and seats. The sofas occupy a fundamental part of the living area, the part dedicated to relaxation and conviviality. They must therefore ensure a correct and balanced posture. Technical or natural fabrics, leathers, velvets, materials in different colors. Simple versions or enriched with wide armrests, support systems or containers to equip an autonomous and multifunctional area.