Ken,
This topic has been beat to death on these forums. lol If you do a search you'll see just what I mean. It's become a big can of worms.
Nobody here can prove to me one way or another. I guess I am still on the fence. I've read the articles posted such as the one Kevin quoted above. I've read the claims by the manufacturers. And I have also discussed it with a couple chemists at the local university where I am employed.
Bottom line is that nobody can conclude one way or another whether the garments work as advertised. The chemists I spoke with agree wholeheartedly that it's just not possible to completely recharge activated carbon in a household dryer. But they did say that a dryer would remove some of the odor molecules. Unfortunately without a thorough scientific test there really is no way to know whether or not the amount being released in a dryer is enough to make the garment effective again. And if it is made effective just how long can you wear the garment before it's full again.
Personally I do own some Scent Lok garments. I follow the manufacturers directions. I also understand that it may not be working as advertised. That is a chance I took when I forked over the $$$.