Abstract: A standard polyurethane doped with a polymeric gel uniformly diffused in the body, where the polyurethane acquires the properties of the gel without any change to its structure in a durable stable manner.
Abstract: An adjustable spring mattress includes a plurality of parallelepipedal bodies made of a synthetic elastic material and being mutually coupled together. Each body houses an inner coil spring, and is separated from adjoining bodies through a throughgoing hole. The bodies are partially separated by V-shaped separating slots which longitudinally and transversely traverse the mattress.