3 adjectives to describe prophylactic

men laughing to scorn the flimsy prophylactics of society, separated by an infinity of self-confidence and spiritual integrity from the ordinary easily-crushed criminal of our days.

When I drank one, I not only quenched my thirst, but felt that I had taken an infallible prophylactic against the malarial fever.

A healthy soul is a better prophylactic than belladonna.

3 adjectives to describe  prophylactic