I take the view that I rather worry a little too much than not enough when it comes to health and safety.

ALL the major outdoor clothing MFGS offer clothes treated with some form of Permethrin.

Insect Shielded is a proprietary mix but they are all based on Permethrin. The clothes you buy are said to be good thru 70 washing's and are at the .5% solution which is what you want for clothing.

As long as you don't go above that percentage I have to think you'll be okay. All those companies wouldn't risk major lawsuits if they didn't think it was safe at that percentage.

I know a few people that had Lyme disease and it is not something to take lightly. Even if you only use Permethrin self-treated garments a few weeks of the year on canoe trips, I have to believe any potential risks from that limited exposure is far less than getting Lyme disease?