If it works so well how come I can smell my own farts??

I also can't figure out why the TV guys covered head to toe in the stuff get busted all the time.
What I don't get is when guys wear scent-loc or any other outer wear including boots in the truck while they head out??
I feel better hand washing regular coveralls and letting them air dry. They hang out in plastic totes or bags and I just don't put them on until I'm away from the truck.
I do have a scent-loc day pack just in case it does work at all..