Many hunters are showing little consideration for wind direction due to the invention of scent eliminating sprays and clothing. While these products keep us from stinking up the whole place, they are not the answer to the entire problem.
Most human scent comes from our breath and the sebaceous glands behind our ears and these products do little to help those areas.
I use these products whenever I go into the field. They help a great deal in keeping my passive scent undetected.
However the old-fashioned way of staying downwind of the deer is the only true way to keep your scent away from the deer.