I installed some 3M Scotchlite reflective tape on the back of the saddle bags.
During the day it looks just
like the black of bags and is hard to tell it's there. At night, when
headlights hit it, it reflects back and creates a larger cross-section
to the bike to improve visibility. You can find this stuff in many different
forms and at several sources. I got it for a decent price at Galls
x 60" rolls. Enough to do at least 2 bikes.
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