I don't know how it is elsewhere. Here in Florida your fletch gets soaking wet just from the humidity first thing in the morning, rain or dry. That's why I changed over myself a few years ago. My concern however is I personally get better accuracy from stiffer vanes, feathers are also very rigid, and a properly spined arrows vane will not contact the bow riser due to paradox. As such I believe the trad only vanes are really more of a marketing gimmick that a necessity for trad archers.