I have used those ridicuously priced scent-lok suits for two seasons. I then bought a Military chemical suit for this years season. I have found that the military suit has more concentrated carbon than those scent-lok suits. Those scent lok and scent blocker suits are pretty much useless after 1 season due to the fact the consumer can't get the suit to a temperature to re-activate it. The Military Chemical suit should last for 2 to 3 seasons of average use for only about $50.00. I recommend only washing once when you purchase one. You then need to hang dry outside on an extra hot day in the summer.