ðˈɛn ðə mˈoʊld pˈɑːɹts ɑːɹ ɐsˈɛmbəld wɪð ɐn ˈɑːɹmətʃˌʊɹ ɪnsˈaɪd, ænd ðeɪ ɑːɹ fˈɪld wɪð ɐ lˈɪkwɪd mətˈɪɹiəl fˈoʊm lˈeɪtɛks, sˈɪlɪkˌoʊn ɹˈʌbɚ, jˈʊɹɹɪθˌeɪn fˈoʊm, ɛtsˈɛtɹə.
Then the mold parts are assembled with an armature inside, and they are filled with a liquid material (foam latex, silicone rubber, urethane foam, etc.)