I could see it, Sent Lok says that it will block 100% of the human smell. You can't say something like that and not expect to be sued. They should really say something like blocks up to 99%, cus that leaves room for saying "well, we didn't say it would block everything."
I also think it's over used anyway. I've always felt a liquid spray cover sent works much, much better. And the you can never use it as a substitute for good hunting practices.
I've been doing some research into this. And I would first like to point out that the link Jance provided is two years old. The lawsuit has been thrown out and refiled, the last news I've been able to find so far is from December of 08 (so fairly recently), in which Dr. Amos Turk was deposed. That is the latest thing I have been able to find out on this thing. I've been trying to figure out if I should do a story on this, I'm not sure because there just doesn't seem to be a lot going on with it.
http://www.startribune.com/sports/outdoors/11648091.html
"The suit was filed against ALS Enterprises Inc. of Muskegon, Mich., which produces and licenses "Scent-Lok" clothing sold under that name and others, including ScentBlocker. The suit says the company is the largest maker of such clothing and licenses it to at least 22 others, including Gander Mountain Co., Cabela's Inc., Bass Pro Shops Inc. and Browning Arms Co. Those four firms also are named as defendants."
This is really interesting, and it will be interesting to see what comes of it.