I believe the red reflective backing is the same stuff that roadsigns are covered with. Its designsed to relect back the light from headlights. In my way of thinking its not for you to shine a torch on, like you said there would be no point. It may be used to relect back the light from searchlights etc, and give a red flash to help rescuers home in on you.
Johno
_________________________
Follow the Sapper