Shure Sound-Isolating Earphones can be used with foam, soft flex or triple flange sleeves. Earphone Sleeves provide comfort and isolation from ambient noise. They have a central tube which fits over the sound exit of Shure earphones and delivers audio directly to the ear canal.
Once on the earphone Shure Yellow Foams can be easily compressed using the fingers. After insertion into the ear the foam re-expands to create a tight seal to the ear canal. This seal maximises isolation from ambient noise, enhances the bass response of the earphones and allows playback at lower volumes for better long-term hearing health.