MHO is that they aren't worth it. If I was going to do it, I would take kevin1's advice and get an old MOPP suit. I used to where one of those as an infantryman, and I hate them, but that is a different issue. Here is a link with someone's opinion that is more educated about these things than me. http://www.fastestbows.com/articles/corrigan/scent_suits.htm