Featuring the Patented Cert-A-Fit® Technology 

In a study presented at the National Hearing Conservation Association’s 2026 conference, users achieved an average PAR of 28.8 dB when foam plugs were inserted with Sert-A-Plug after brief instruction, versus 17.2 dB for naive manual self-insertion measured in the same study. A second group of 44 occupational hearing conservation students, tested in five West Coast cities, averaged 26.8 dB with the applicator after instructor demonstration (Johnson & McCall, NHCA 2026). PAR is a personal fit measurement; individual results vary with ear anatomy, plug selection, and insertion technique. The foam earplug carries its Noise Reduction Rating (NRR) under the manufacturer’s EPA-regulated label..

Specializing in the most important aspect of foam earplug usage, the FIT! Fit Matters “Because It’s Loud Out There!”

• Consistency in foam earplug fittings — Foam earplugs seat to their design depth consistently.
• Ease of application — Simple, efficient, and easy to use!