A method for manufacturing a breast implant includes producing an elastic filler material including foam, by applying a source of gas bubbles to a silicone monomer to create a mixture. The mixture is inserted into a sealed chamber. After inserting the mixture, a pressure inside the sealed chamber is set to a first pressure, and a temperature of the mixture inside the sealed chamber is set to a first temperature. Then, following a preset time duration, the pressure is lowered to a second pressure that is lower than the first pressure, and after a given time, the temperature is lowered to a second temperature that is lower than the first temperature. A flexible shell, configured for implantation within a breast of a human subject, is filled with the elastic filler material.
