Longer wear time comfort with the Firm Fit Earplug Refill along with increased protection and greater compliance. Greater Protection: SNR 37dB provides excellent protection in most medium-to-high noise environments. Easy to Insert: Requires less pressure to roll down. Slow recovery rate gives you plenty of time to correctly insert in ear canal. Easy to See: Distinct warning orange color makes compliance checks easy. Softer: You can feel that FirmFit is softer when you hold it. Less Pressure: FirmFit exerts less expansion pressure on the ear canal.