Any hunter who has hunted more than a day knows that you can't controll swirling winds, thermals and direction of deer travel.
Where I hunt deer, the prevailing winds are quite consistant and I do know the travel routes that the deer take because I have hunted the same land for many years.I have been hunting big game for over 30 years and have taken ten different north american species of big game all without scent loc products.It is a fact that no scent loc suit can contain 100% of your scent unless it is totally sealed which would make it very difficult to breath,so some of your scent will always be carried by the wind.Therefore the only sure way to keep an animal from smelling you is to stay downwind of them or to be elevated high enough that the wind carries your scent above any animals that are near you.