Pavan, have you discussed Permethrin with any of the military guys who have been deployed in recent times? I talked with a guy who said they soaked their uniforms in a solution, and it was effective for many weeks. He did not know the dilution ratio, though. The commercial spray that I use is 0.5% permethrin and is very effective. It also lasts through several washings, but I touch up every single time I go out. I've been through a couple of tick borne diseases, so this is very important to me.