Tri-SealTM Reusable Silicone Ear Plugs (Set of 12)

Noise levels are measured in decibels (dBA). Most people talk at about 70 decibels. Decibels are measured on a scale like the one for earthquakes -- so when the decibels go up a little, the noise goes up a lot. For example 73 decibels is twice as loud as 70. Triple-flanged plug design conforms to a variety of ear canal sizes. Plastic carrying case with key chain increases convenience and product demand. Washable and reusable for maximum value High Noise Reduction Rating (NRR 25). MSA Safety Works Hearing Protection is tested in accordance with ANSI S3.19-1974.