Hearing loss from loud sound affects millions of people, but noise-induced hearing loss is preventable! ER20XS high-fidelity earplugs reduce sound levels while preserving sound quality and clarity. ER20XS earplugs are configured to replicate the natural response of the ear, so sound quality is the same as the original, only quieter. Music, voices and other sounds are clear--not muffled--making ER20XS ideal for concerts, clubs, theaters, aircraft, construction, yard work, airshows, parades, and athletic or motorsports events. The new low-profile, stem-less design fits snugly in the outer ear without protruding, making ER20XS comfortable to wear under hats, helmets, and other headgear. The standard-size eartips fit the majority of ears. ER20XS earplugs are reusable, but with repeated use, the eartips may lose elasticity. For best performance and retention, if you use your ER20XS earplugs frequently, replace the eartips every 3-6 months. ER20XS are not recommended for use with impulse noises such as gunfire, or for sleeping.Not recommended for use with impulse noise, E.G., shooting sports. Not recommended for sleeping. Sound QUALITY is so good, they're used by professional and amateur musicians. Hear the difference True high-fidelity makes. Reduces sound levels evenly so speech and environmental sounds are clear and natural. New, low-profile design fits snugly in the ear without protruding; comfortable to wear under hats, helmets and other headgear. Reduces the potential for hearing damage from machinery, vehicles, tools, sporting events, concerts. Ear tips are interchangeable and replaceable, making them the most cost-effective high-fidelity earplug. Includes: 1 pair Standard Fit ER20XS High-Fidelity Earplugs, neck cord, and carrying case.Best Sellers Rank: See Top 100 in Health & Household. Style: Standard Fit. Size: 4 Piece Set. Recommended Uses For Product: Noise Protection. Color: Clear Stem/Frost Tips. Brand: Etymotic Research. Country of Origin: China. : B00RM6Q7FC. Manufacturer: Etymotic Research. Date First Available: December 30, 2014. Item model number: ER20XS-SMF-C. Product Dimensions: 1.57 x 2.56 x 0.79 inches; 0.35 Ounces. Is Discontinued By Manufacturer: No.