I'm not much of a believer in either one. However, I still play around with scent killers, cover scents, etc. I have found that crushing fresh garlic on my boots to be as effective as any commercial products I have used. On a number of occasions deer have followed my exact track through the woods with noses to the ground not showing any signs of concern. On the down side yellow jackets seem to be attracted to the garlic. I've also had deer spook from it. I'm not sure if there is any decisive resolution to this issue. I have never used scent control clothes, as they are too expensive. Basically, if the wind is wrong, the deer is gonna smell you.