Adventure Comics #193

Clark goes swimming and hides his costume, but a boy finds it. He dons it to impress a girl, is seen as a fraud, so Superboy, in a spare suit, steers a harmless bear their way to buck up the boy's courage. Then a down-and-outer finds it and uses it for his first desperate robbery (on a jewelry store Superboy fakes), but regrets it and stays honest. A crook shows off "indestructible cloth" and sells many bolts, until Superboy makes him return the money. Superboy says the costume "made quite an impression" on three people, without "the slightest tear or stain on it!"

Plot details indexed by the Grand Comics Database (CC BY-SA).