Shure SE530 User Manual page 5

CHOOSING AN EARPHONE SLEEVE
Your earphones come with a selection of sleeves. Make sure the sleeve
you choose is easy to insert into your ear, fits comfortably, and is easy to
remove from your ear.
Soft Flex Sleeves
In small, medium, and large sizes. Made from pliable rubber.
Soft Foam Sleeves
When using the foam sleeves, compress the sleeve between your
fingers before inserting it into the ear canal. Hold the earphone in
place for about ten seconds while the foam expands and creates a
tight seal.
Triple-Flange Sleeves
If desired, the sleeve stem may be shortened. Use a sharp scissors to
carefully trim the stem to the desired length.
Note: Carefully slide sleeve over earphone nozzle barb for a secure grip.