The day I received the flashers in the mail I put them on about 20 out of the 80 total decoys I own and haven't taken them off. Like I said, they are very durable. I throw the decoys with the flashers right in the bag with the rest of the decoys. Day in, day out, in and out of the water, in and out of the bag for the last 5 or 6 years. Haven't torn one, haven't lost one. Do they work? That is very difficult to say unless you compare an identical spread WITH flashers against an identical spread WITHOUT the flashers. Do they add realism? Absolutely. When the wind is blowing, they flap around just like real ducks do. I also use Spinners and Jerk Strings and a boat blind and face paint and insist everyone I hunt with cover up and keep still when ducks are working. So I guess I'm one of those guys that "throws the book" at the ducks. This is my 45 consecutive year of duck hunting (can't get it out of my system). I've got 18 days in the blind this year and killed 158 ducks. See photo.