We will be in the Amazon region for a couple of weeks and the tour operator is recommending spraying all outer garmets with permethrin. Question: Would you advise, and would it damage, our new REI Gore Tex rain shells to spray them with permethrin?
@doc_floyd Great question and what an amazing sounding adventure you are heading on!
You will be fine using permethrin on your new REI Gore-Tex rain shells. It is also worth considering pairing your permethrin with a picaridin product as that will give you more protection (particularly against biting flies) and will also not damage your new rain shells.
Have a great adventure!