'Another Goodyear contribution to progress'. Since the Japanese Invasion of the Dutch East Indies the loss of our crude rubber supply has been extremely serious to the Allied War Effort. It is therefore the National Duty of everyone to get the maximum life from all rubber products; and to make sure that every ounce of used rubber is salvaged . . . . . Rubber must be conserved. Goodyear, the foremost pioneers in rubber, are also pioneers in synthetic rubber. Many years of tireless work lie behind Chemigum - Goodyear's synthetic product. But the story is not yet complete.