Size: **Standard Fit** Etymotic High-Fidelity Earplugs ER20XS are the world's highest fidelity non- custom earplugs. The earplugs reduce most noise to safe levels while preserving the clarity of the music or conversation. Protect your ears with the Etymotic Ear Plugs as exposure to excessive noise can cause permanent hearing damage. Advanced technology lowers sound levels evenly by 20 decibels. Discreet, stem-less design fits snugly in outer ear allowing them to be worn with helmets, hats, and other head gear. The Etymotic Earplugs are reusable and with heavy use, the elasticity of the earplugs can diminish. For best performance and retention, replace the earplugs every 3-6 months. Purchase Includes: 2 pairs of the Etymotic ER20 Blue Color Standard Fit Ear Plugs, 2 pairs of the Etymotic ER20 Clear Color Large Fit Ear Plugs, 4 Carrying Cases, 4 Black Cords, and 1 Liberty Cleaning Cloth