Etymotic Research ER20 High-Fidelity Earplugs - the world's first and highest fidelity non-custom earplugs. These earplugs use a proprietary tuned resonator and acoustic resistor to replicate the natural response of the ear canal. Sound is reproduced, unchanged as the ear would hear it, only quieter. 

Features

• Replicates the natural response of the ear, so sound quality is natural, only quieter. Music and speech are clear, not muffled.
• Reduces risk of hearing damage from loud noise such as concerts, theaters, airshows, parades, athletic and motorsports events.
• Enhances the music experience; Allows musicians to hear their own instrument and blend with others.
• Not recommended for use with impulse noise, e.g., shooting sports. Not recommended for sleeping.

What's In The Box

• 1 Pair Standard Fit ETY Plugs
• Neck cord
• Carrying Case