Etymotic HD•Safety™ Earplugs + Earphones - Manual (Page 5)

4
Warnings
(continued)
Human ear canals are about an inch long and Etymotic eartips
are designed to seal deeply in the ear canal. This may feel slightly
uncomfortable at first, but should become comfortable with
repeated use. Discontinue use if any discomfort persists.
In rare instances an eartip may come off in the ear canal when
removing the earphone. If this should occur and the eartip cannot
be easily removed, it is recommended that you promptly contact
an audiologist or other medical professional. A professional can
use blunt tweezers to remove the eartip.
Consult an audiologist or physician if you have excessive ear wax,
difficulty inserting the eartips, or discomfort after prolonged use.
Be aware of the environment you are working in and know the
hazards of over protection as well as under protection.