and could die. Due to their survival instincts, insects then know to stay away from things or garments with this chemical. And even if a mosquito, fly, or tick lands on a textile containing permethrin, the effects of the chemical would affect them within a very short period of time. Hence, where there is permethrin, insects flee.
Is it dangerous to humans? No. Warm blooded creatures (apart from cats) are able to break down the permethrin as soon as it enters their bodies, so the chemical poses no danger to the hunter.