Man running on treadmill
Sweat-Activated Campaign: A T-shirt that reveals a message as you sweat
This guerrilla marketing concept utilizes hydrochromic (moisture-reactive) ink technology; the garment appears to be a plain T-shirt under normal conditions, but hidden text or a brand logo is revealed when the fabric gets wet with sweat during a workout.
1. Key Copy & Visual Execution
Before (Fitness Center/PT Studio Ad): A plain gray or black T-shirt. After: The phrase "Your limits are proven by sweat | OO GYM" is rev
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