Honda 2007 Civic Hatchback Owner's Manual page 36

Do not expose the front seat-backs
If water or another liquid
to liquid.
soaks into the seat-back, it can
prevent the side airbag system
from working properly.
Do not cover or replace front seat-
back covers without consulting
your dealer. Improperly replacing
or covering front seat-back covers
can prevent your side airbags from
inflating during a side impact.
Additional Information About Your Airbags
Driver and Passenger Safety
33