Permethrin! I go to ACE Hardware and get the 10% concentrate and then dilute it 20 to 1 with water in a spritzer bottle or Hudson sprayer. Hang all your hunting clothes on coat hangars and spray em down. After it dries, you are good for a couple of weeks and a couple of washings. I use the same solution on my dogs and cattle for fleas, ticks, flies, mosquitos, spiders, etc. (I only wish ticks were our only insect problem in Florida.) It is not a repellant. It effects the nervous system in insects and kills them but has no toxic effects on humans once it dries. I read the MSDS sheets on it and it is far safer than DEET once it dries. Great stuff!