I spend a lot of time in the woods turkey hunting and until recently never took ticks very seriously (I contracted Lyme disease years ago and got over it) however lately I have. I spray my hunting clothes with:

It works great. I don't think I have pulled off more then one or two tick a season sense using it. The spray lasts weeks and through several washings. I believe I'm going to spray it on my riding gear when I'm riding off road.