Soft Comfort Spring base, Superposition of polyurethane foams of different densities with a top layer of high-resilience foam with high-performance properties for long life, Digital cutting of foams into specific shapes to give a domed finish to the seat, Top layer of 300gr polyester wadding. Modularity at will, removable and washable cover thanks to Velcro technology , Modules assembled with integrated metal clamps , Complex upholstery for optimum comfort thanks to professional pocket springs.