We’ve Listened to Workers. Extensive research into earplug preferences revealed that some workers prefer a firm foam earplug. They gain a sense of security from feeling the earplug in their ear. And while they like knowing the earplug is there, workers want greater comfort. Independent tests reveal that FirmFit outperforms the leading classic-style earplug, providing workers with a more comfortable option. Longer wear time comfort: More protection. Greater compliance.