The only multiple-use earplug with Conforming Material Technology™ SmartFit™ Detectable uses body heat to adapt to the shape of the ear canal for a comfortable, personalized fit. Designed for process industries such as food and pulp/paper, SmartFit™ Detectable's bright blue color and the detectable ring on the stem and attached metalized cord can be detected by visual or automated methods. It's the ultra-smart choice for today's diverse workplace.