Scent reduction- theless you smell the closer they have to be to smell you. Not only a good thing for that day but good for keeping deer in the area long term.

Cover scent- crazy concept imo. Deer live in nature....even if natural scents covered up human scent you wouldn't need to buy it because its already there. There is already pee, dirt,cedar etc all over the deer woods and picking out the smells that don't belong is what deer do.