Etymotic Research ER20XS Universal Fit High-Fidelity Earplugs in Polybag Package

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Highly-awaited next generation of Etymotic earplugs
New discreet stem-less design fits under hats and helmets
Comes with 3 ear tip options for best fit, comfort and seal
Designed to replicate the natural response of the ear canal
Reduces sound approximately 20dB at all frequencies