 To complete this disguise, Clark avoids violent confrontation, preferring to slip away and change into Superman when danger arises, and he suffers occasional ridicule for his apparent cowardice.In "Superboy" #78 (1960), Superboy makes his costume out of the indestructible blankets found in the ship he came to Earth in.In "Man of Steel" #1 (1986), Martha Kent makes the costume from human-manufactured cloth, and it is rendered indestructible by an "aura" that Superman projects.