Etymotic Research ER20 High-Fidelity Earplugs, Frost with Clear Stem, 1 Pair Standard Fit, Clamshell Packaging. Etymotic ER20-SMF ETY-Plugs High Fidelity Earplugs Standard Fit, Frost Tip ETY•Plugs® are the world’s highest fidelity non-custom earplugs. They reduce most noise to safe levels while preserving the clarity of speech and the richness of music. ETY•Plugs are configured to replicate the natural response of the ear canal so that when sound enters the earplug, it is reproduced unchanged, exactly the same as the ear would hear it, only quieter Benefits Reduces sound levels evenly so that music and speech are clear and natural, not muffled as with other earplugs Reduces risk of hearing damage for many noisy occupations as well as noisy venues, such as airshows, parades, athletic events and motor sports Enhances the music experience for audiences while protecting hearing Lets musicians hear their own instrument and their blend with others Features Low cost Ready-fit Available in 2 sizes (same sound reduction) - standard and large* Reduces sound approximately 20 dB at all frequencies Includes ETY•Plugs earplugs Black neck cord Storage case