Try another eartip size – Bose QuietComfort Earbuds II Noise-Canceling True Wireless In-Ear Headphones (Triple Black) User Manual
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HOW TO WEAR
TRY ANOTHER EARTIP SIZE
Wear the earbuds for an extended period of time. If the eartips don’t feel comfortable
or secure, or sound quality isn’t as expected, try another eartip size.
The size is marked on the bottom of each eartip with a
1
(small),
2
(medium),
or
3
(large).
1
2
3
The size 2 eartips come attached to the earbuds. If size 2 feels too loose, try size 3. If it
feels too tight, try size 1.
You may need to try all three eartip sizes or use a different size eartip for each ear.