Originally Posted by
colorado_rob
I always have treated my DT socks with permethrin, for obvious reasons. All I know, not being able to compare with untreated ones, is that two pair of treated DT socks will last an entire AT hike, and they are still usable after.
I personally don't see a chemical mechanism where permethrin will shorten a wool socks life, at least not significantly enough to worry about. I also agree that self-treating is probably preferable to factory treating, which would have to be refreshed anyway, meaning you'll be self-treating later anyway. So easy to do. Trivial, in fact. Spray, let dry, wash hands, done.