Shure Sound Isolating User Manual page 6

Removing the Earphones
Grasp the body of earphone and gently twist to remove.
Note: Do not pull on cable to remove earphone.
8
Choosing a Sleeve
Select an earphone sleeve that provides the best fit and sound isolation. It
should be easy to insert, fit comfortably, and easy to remove.
Soft Flex Sleeves: In small, medium, and
large sizes. Made from pliable rubber.
Soft Foam Sleeves: Compress the foam
sleeve between your fingers and insert
into the ear canal. Hold in place for about
ten seconds while the foam expands.
Triple-Flange Sleeves: If desired, use
scissors to trim the stem on the sleeve.
9