What person was single handed responsible for a drastic drop in undershirt sales?

The drastic drop in undershirt sales can be attributed to Steve Jobs, co-founder of Apple Inc. His iconic style of wearing black turtlenecks and jeans became synonymous with his personal brand, leading many to abandon traditional undershirts in favor of a more minimalist look. This shift in fashion preferences impacted the undershirt market significantly, as consumers moved away from layering. Jobs' influence on tech culture and casual wear ultimately contributed to the decline in undershirt popularity.