"Top protection - very high sound attenuation levels Top sound - excellent speech recognition Top fit - very comfortable to wear The ergonomically designed disposable uvex x-fit earplugs have a special feature of very high attenuation values, which makes them suitable for use in very noisy environments. uvex x-fit has an outer layer that prevents foreign bodies from entering the earplugs. The soft foam ensures a high level of comfort even when worn for extended periods of time. The ""x"" imprint at the end of the earplug makes it easy to remove, while reducing pressure on the outer wall of the ear canal."