MJR...don't worry about it. It's as good as it was 3 years ago.[&:] The deer that didn't smell you last year still won't.[8D] The problem being with these things, they wear out real fast. Throw in an accidental dose of sweat, fatty acids, oils etc etc and it's shot. IT may beable to purge itself of some "Scent molecules" but it can't get rid of non-volitile substances that vaporize at a much higher temperature than you get from a home dryer. Hunt the wind and be happy. And such things as Scentlok boots are a total waste of money. All it does is add another 50-75 dollars to the cost. As you may have guessed, I come from the Atlasman School of Science. I used activated carbon for 30 years in the dry cleaning industry. I wouldn't count on it to last long as a scent eliminator. Hunt the wind Grasshopper.