From my personal observations I think you would by better off sewing reflective tape to your gear. As I drive home these days I notice that the snow stakes which use reflective tape are much more viewable from different angles and greater distances than the ones which use the reflective plastic discs. You can get adequate quality reflective tape from most sewing shops. Or, if you want the good stuff, contact Gall's or any company that makes protective gear for<br>Fire/EMS folks.<br>Also, if you don't want to compromise the integrity of the fabric of your gear you can sew the tape to the straps instead. I have done this to a couple of packs without much difficulty.<br><br>Chris